Materiały źródłowe

• #1 Food allergy – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/food-allergy/symptoms-causes/syc-20355095

  Food allergy is an immune system reaction that happens soon after eating a certain food. […] When you have a food allergy, your immune system mistakenly identifies a specific food or a substance in food as something harmful. In response, your immune system triggers cells to make an antibody known as immunoglobulin E (IgE) to recognize the allergy-causing food or food substance, called an allergen. […] The next time you eat even the smallest amount of that food, IgE antibodies sense it. They then signal your immune system to release a chemical called histamine, as well as other chemicals, into your bloodstream. These chemicals cause allergy symptoms. […] Most food allergies are triggered by certain proteins in: Crustacean shellfish, such as shrimp, lobster and crab; Peanuts; Tree nuts, such as walnuts and pecans; Fish; Chicken eggs; Cow’s milk; Wheat; Soy.

• #2 Food allergy

  https://www.nhs.uk/conditions/food-allergy/

  A food allergy is caused by your immune system overreacting to certain types of food. […] It’s not clear why this happens, but certain foods are more likely to cause an allergic reaction in some people. […] You have a slightly higher chance of getting a food allergy if you or a close family member have other allergies, asthma or eczema.

• #3 Causes and Prevention of Food Allergy | NIAID: National Institute of Allergy and Infectious Diseases

  https://www.niaid.nih.gov/diseases-conditions/food-allergy-causes-prevention

  A food allergy develops when a person eats, touches or inhales a protein in food called an allergen, and then the immune system makes a type of antibody against the allergen called IgE. Copies of this IgE antibody move through the blood and attach to two kinds of cells in the immune system. […] Scientists have many basic questions about food allergy. These include: Why do some people develop IgE antibodies to certain foods while other people do not? Why do some people who develop IgE antibodies to a food allergen have no allergic reaction? Why do some people with food allergy have severe allergic reactions, but not others? Researchers are seeking answers to these questions with the hope of finding ways to prevent food allergies or make allergic reactions to food less severe. […] For several decades, health care experts advised parents to avoid giving infants foods that could cause food allergy. But in 2008, the American Academy of Pediatrics decided there was no convincing evidence that delaying giving such foods to infants older than 6 months could prevent food allergy. Finally, the 2015 results of a NIAID-funded study called Learning Early About Peanut Allergy (LEAP) led to a complete reversal of the old advice.

• #4 Food Allergies – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK482187/

  Food allergy can have 2 etiology depending on the mechanism of disease: IgE-mediated or type I hypersensitivity and other immunologically non-IgE mediated reactions. […] The food allergens are usually water-soluble glycoproteins that are resistant to breakdown and are easily transported across the mucosal surface in the intestine. […] Risk factors for severe food allergies or anaphylaxis include: Asthma, Prior episodes of anaphylaxis, Delay in the use of epinephrine.

• #5 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  While any food can cause an adverse reaction, eight types of food account for about 90 percent of all reactions: Eggs, Milk and Dairy, Peanuts, Tree nuts, Fish, Shellfish, Wheat, Soy, Sesame. […] Symptoms of an allergic reaction may involve the skin, the gastrointestinal tract, the cardiovascular system and the respiratory tract. […] Most food-related symptoms occur within two hours of ingestion; often they start within minutes. […] Another type of delayed food allergy reaction stems from food protein-induced enterocolitis syndrome (FPIES), a severe gastrointestinal reaction that generally occurs two to six hours after consuming milk, soy, certain grains and some other solid foods. […] Not everyone who experiences symptoms after eating certain foods has a food allergy or needs to avoid that food entirely.

• #6 Food Allergy | Allergy UK | National Charity

  https://www.allergyuk.org/types-of-allergies/food-allergy/

  A food allergy is when the body’s immune system reacts unusually to specific foods. […] It’s still unknown why people develop allergies to food, although they often have other allergic conditions, such as asthma, hay fever and eczema. […] Diagnosing a food allergy is essential for preventing reactions, managing symptoms, improving quality of life, avoiding unnecessary dietary restrictions, and ensuring proper support and guidance for individuals living with food allergies. […] IgE-mediated food allergy is the most common type, triggered by the immune system producing an antibody called immunoglobulin E (IgE). […] Non-IgE-mediated food allergies refer to allergic reactions that occur without involving Immunoglobulin E (IgE) antibodies. […] Mixed IgE and non-IgE-mediated food allergies: Some individuals may experience a combination of both IgE-mediated and non-IgE-mediated responses to certain foods.

• #7 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  While any food can cause an adverse reaction, eight types of food account for about 90 percent of all reactions: Eggs, Milk and Dairy, Peanuts, Tree nuts, Fish, Shellfish, Wheat, Soy, Sesame. […] Symptoms of an allergic reaction may involve the skin, the gastrointestinal tract, the cardiovascular system and the respiratory tract. […] Most food-related symptoms occur within two hours of ingestion; often they start within minutes. […] Another type of delayed food allergy reaction stems from food protein-induced enterocolitis syndrome (FPIES), a severe gastrointestinal reaction that generally occurs two to six hours after consuming milk, soy, certain grains and some other solid foods. […] Not everyone who experiences symptoms after eating certain foods has a food allergy or needs to avoid that food entirely.

• #8 Manifestations of Food Allergy: Evaluation and Management | AAFP

  https://www.aafp.org/pubs/afp/issues/1999/0115/p415.html

  The pathogenesis of nonIgE-mediated reactions in food allergy is not as clearly defined, but T cells and macrophages most likely play a role. Illnesses caused by these nonIgE-mediated immunologic responses to food affect the same organ systems that the IgE-mediated forms affect. […] A number of immunologic reactions to food proteins are not mediated by IgE. Celiac disease presents over a period of months with steatorrhea, flatulence and weight loss. Hypersensitivity to gluten causes the disease, and the characteristic diagnostic feature is extensive flattening of villi in a biopsy specimen taken from the jejunal mucosa. […] Although allergic eosinophilic gastroenteritis is an IgE-mediated disease in some patients, about one half of patients do not exhibit specific IgE antibody to foods.

• #9 Food Allergy | Allergy UK | National Charity

  https://www.allergyuk.org/types-of-allergies/food-allergy/

  A food allergy is when the body’s immune system reacts unusually to specific foods. […] It’s still unknown why people develop allergies to food, although they often have other allergic conditions, such as asthma, hay fever and eczema. […] Diagnosing a food allergy is essential for preventing reactions, managing symptoms, improving quality of life, avoiding unnecessary dietary restrictions, and ensuring proper support and guidance for individuals living with food allergies. […] IgE-mediated food allergy is the most common type, triggered by the immune system producing an antibody called immunoglobulin E (IgE). […] Non-IgE-mediated food allergies refer to allergic reactions that occur without involving Immunoglobulin E (IgE) antibodies. […] Mixed IgE and non-IgE-mediated food allergies: Some individuals may experience a combination of both IgE-mediated and non-IgE-mediated responses to certain foods.

• #10 Patient education: Oral allergy syndrome (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/oral-allergy-syndrome-beyond-the-basics/print

  Oral allergy syndrome (OAS), which is also called pollen-food allergy syndrome (PFAS or PFS), is a type of food allergy caused by uncooked fruits, raw vegetables, spices, and nuts. […] OAS is caused by allergens in foods that come from plants. These are mainly uncooked fruits and raw vegetables. Some nuts can cause OAS symptoms, but since nuts can also trigger allergic reactions that are not related to pollen and can be severe, extreme caution is needed with nut reactions. Only foods that come from plants cause OAS. Other types of foods, such as dairy, seafood, or meats, do not cause OAS. […] The allergens that cause OAS are easily destroyed by stomach acid, so the reaction usually stops as soon as the food is swallowed. Also for this reason, OAS rarely causes severe or life-threatening reactions. Cooking or heating also destroys the allergens, so cooked or canned fruits and vegetables rarely cause symptoms of OAS.

• #11 Oral Allergy Syndrome | Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/pollen-food-allergy-syndrome/

  Pollen Food Allergy Syndrome (PFAS), also known as oral allergy syndrome, is caused by cross-reacting allergens found in both pollen and raw fruits, vegetables, or some tree nuts. The immune system recognizes the pollen and similar proteins in the food and directs an allergic response to it. […] Those with PFAS typically have allergy to birch, ragweed, or grass pollens. […] Diagnosis of PFAS is made after taking a patient’s clinical history and, in some cases, conducting skin prick tests and oral food challenges with raw fruit or vegetables. […] If you or your child experience a reaction beyond the mouth area after eating a fresh fruit or raw vegetable, that food could be considered a risk for anaphylaxis, a serious reaction that comes on quickly and may cause death. […] In one study, researchers found that PFAS progressed to systemic symptoms in nearly 9 percent of patients and to anaphylactic shock in 1.7 percent of patients. […] Avoiding the food in raw forms is the most common way to manage this.

• #12 Food allergy – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/food-allergy/symptoms-causes/syc-20355095

  Pollen-food allergy syndrome affects many people who have hay fever. In this condition, certain fresh fruits and vegetables or nuts and spices can trigger an allergic reaction that causes the mouth to tingle or itch. […] Proteins in certain fruits, vegetables, nuts and spices cause the reaction because they’re similar to allergy-causing proteins found in certain pollens. This is an example of cross-reactivity. […] Eating certain foods may cause some people to feel itchy and lightheaded soon after starting to exercise. Serious cases may even involve hives or anaphylaxis. […] A food intolerance or a reaction to another substance you ate may cause the same symptoms as a food allergy does such as nausea, vomiting, cramping and diarrhea. […] Depending on the type of food intolerance you have, you may be able to eat small amounts of problem foods without a reaction. By contrast, if you have a true food allergy, even a tiny amount of the food may trigger an allergic reaction. […] While celiac disease is sometimes referred to as a gluten allergy, it does not result in anaphylaxis. Like a food allergy, celiac disease does involve an immune system response, but it’s a unique reaction that’s more complex than a simple food allergy.

• #13 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  While any food can cause an adverse reaction, eight types of food account for about 90 percent of all reactions: Eggs, Milk and Dairy, Peanuts, Tree nuts, Fish, Shellfish, Wheat, Soy, Sesame. […] Symptoms of an allergic reaction may involve the skin, the gastrointestinal tract, the cardiovascular system and the respiratory tract. […] Most food-related symptoms occur within two hours of ingestion; often they start within minutes. […] Another type of delayed food allergy reaction stems from food protein-induced enterocolitis syndrome (FPIES), a severe gastrointestinal reaction that generally occurs two to six hours after consuming milk, soy, certain grains and some other solid foods. […] Not everyone who experiences symptoms after eating certain foods has a food allergy or needs to avoid that food entirely.

• #14 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  While any food can cause an adverse reaction, eight types of food account for about 90 percent of all reactions: Eggs, Milk and Dairy, Peanuts, Tree nuts, Fish, Shellfish, Wheat, Soy, Sesame. […] Symptoms of an allergic reaction may involve the skin, the gastrointestinal tract, the cardiovascular system and the respiratory tract. […] Most food-related symptoms occur within two hours of ingestion; often they start within minutes. […] Another type of delayed food allergy reaction stems from food protein-induced enterocolitis syndrome (FPIES), a severe gastrointestinal reaction that generally occurs two to six hours after consuming milk, soy, certain grains and some other solid foods. […] Not everyone who experiences symptoms after eating certain foods has a food allergy or needs to avoid that food entirely.

• #15 Food Allergies: What You Need to Know | FDA

  https://www.fda.gov/food/buy-store-serve-safe-food/food-allergies-what-you-need-know

  Although new treatments are being developed, there is no cure for food allergies. Medical diagnosis to find out which foods cause an individual to have an allergic reaction and strictly avoiding those foods are important ways to prevent serious adverse health effects. […] While many different foods can cause allergic reactions, the Food Allergen Labeling and Consumer Protection Act of 2004 (FALCPA) identified eight foods as major food allergens: milk, eggs, fish, Crustacean shellfish, tree nuts, peanuts, wheat, and soybeans. […] On April 23, 2021, the Food Allergy Safety, Treatment, Education, and Research (FASTER) Act was signed into law, declaring sesame as the 9th major food allergen recognized by the United States. […] FALCPA requires that food labels clearly identify the food source names of any ingredients that are one of the eight major food allergens or contain protein derived from a major food allergen. Proper labeling of foods helps allergic consumers identify foods or ingredients that they should avoid.

• #16 Facts and Statistics – FoodAllergy.org

  https://www.foodallergy.org/resources/facts-and-statistics

  A food allergy is an adverse health effect resulting from a specific immune response that occurs reproducibly on exposure to a given food. In plain language, a food allergy is when a person’s immune system overreacts to something in a certain food. This part of the food that the body reacts to is usually a protein and is called an allergen. The immune system thinks the allergen is a threat and tries to attack it. This response can cause a range of symptoms, which are called an allergic reaction. […] More than 170 foods have been reported to cause food allergy reactions in the U.S. In 2004, eight major food allergens—milk, egg, peanut, tree nuts, wheat, soy, fish, and crustacean shellfish—were identified as responsible for at least 90 percent of the serious food allergy reactions in the U.S. In 2021, the U.S. added sesame as the ninth major food allergen.

• #17 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  Learning about patterns of cross-reactivity and what must be avoided is one of the reasons why people with food allergies should receive care from a board-certified allergist. […] The most common food allergens in adults are: Fruit and vegetable pollen (oral allergy syndrome), Peanuts and tree nuts, Fish and shellfish. […] Once a food allergy is diagnosed, the most effective treatment is to avoid the food. […] Children may outgrow their allergic reactions to milk and to eggs. Peanut and tree nut allergies are likely to persist. […] Allergic reactions to food can affect the skin, respiratory tract, gastrointestinal tract and cardiovascular system. […] It is impossible to predict how severe the next reaction might be, and all patients with food allergies should be carefully counseled about the risk of anaphylaxis, a potentially fatal reaction that is treated with epinephrine (adrenaline).

• #18 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  An allergy occurs when your body’s natural defenses overreact to exposure to a particular substance, treating it as an invader and sending out chemicals to defend against it. […] Almost 6% of U.S. adults and children have a food allergy. […] Food allergy symptoms are most common in babies and children, but they can appear at any age. You can even develop an allergy to foods you have eaten for years with no problems. […] A food allergy reaction occurs when your immune system overreacts to a food or a substance in a food, identifying it as a danger and triggering a protective response. […] While allergies tend to run in families, it is impossible to predict whether a child will inherit a parent’s food allergy or whether siblings will have a similar condition. […] Some research does suggest that the younger siblings of a child with a peanut allergy will also be allergic to peanuts.

• #19 Food Allergies in Children – Symptoms, Causes, & Management

  https://www.allergyfree.co.in/en-gb/know-your-allergy/food

  According to the Centers for Disease Control and Prevention, food allergies are estimated to affect 4% – 6% of children and 4% of adults. […] A food allergy occurs when your immune system mistakes harmless food as something that can harm your body. […] A food allergy, on the other hand, causes your immune system to react and affects numerous organs in the body. […] Causes of food allergies in adults include shellfish (shrimp, lobster, crab), peanuts, and tree nuts (walnuts, pecans). […] Causes of food allergies in children include peanuts, tree nuts, eggs, cow’s milk, wheat, and soy. […] Certain fruits, vegetables, nuts, and spices cause allergic reactions because the proteins found in them are similar to the proteins found in the allergenic pollen. […] Milk allergy, egg allergy, wheat allergy, and soy allergy may disappear over time, while peanut allergy, tree nut allergy, fish allergy, and shellfish allergy tend to be lifelong.

• #20 Food Allergy Symptoms, Rash, Common List, Testing, Treatment

  https://www.medicinenet.com/food_allergy/article.htm

  They are proteins that usually resist the heat of cooking, the acid in the stomach, and the intestinal digestive enzymes. […] The mechanism of food allergy involves the immune system and heredity. […] The tendency of an individual to produce IgE against something seemingly as innocuous as food appears to be inherited. […] Food allergy is a hypersensitivity reaction, meaning that before an allergic reaction to an allergen in food can occur, a person needs to have been exposed previously, or „sensitized,” to the food. […] The next time the person eats that particular food, its allergen hones in on the specific IgE antibody on the surface of the mast cells and prompts the cells to release chemicals such as histamine. […] Food allergy is caused by immune reactions to foods, sometimes in individuals or families predisposed to allergies.

• #21 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  An allergy occurs when your body’s natural defenses overreact to exposure to a particular substance, treating it as an invader and sending out chemicals to defend against it. […] Almost 6% of U.S. adults and children have a food allergy. […] Food allergy symptoms are most common in babies and children, but they can appear at any age. You can even develop an allergy to foods you have eaten for years with no problems. […] A food allergy reaction occurs when your immune system overreacts to a food or a substance in a food, identifying it as a danger and triggering a protective response. […] While allergies tend to run in families, it is impossible to predict whether a child will inherit a parent’s food allergy or whether siblings will have a similar condition. […] Some research does suggest that the younger siblings of a child with a peanut allergy will also be allergic to peanuts.

• #22 What Causes Food Allergies? – TexasAllergyMD

  https://texasallergymd.com/blog/what-causes-food-allergies/

  As an allergist, the key to identifying effective treatments for food allergies lies in understanding their underlying causes. […] To understand what causes food allergies we must first look at the immune system the bodys natural defense against harmful substances. […] However, the immune system of a person with allergies mistakenly considers specific food proteins to be harmful. […] In food allergies, a type of antibody called Immunoglobulin E (IgE) flags certain foods as a threat. […] The above nine foods are considered by the U.S. Food and Drug Administration to be major food allergens. […] Genetics is one factor causing increased risk. […] If family members have a food allergy, you are more likely to have a food allergy as well, though the problem food may differ. […] Another factor is age, as a child is more likely to have a food allergy due to their developing immune system. […] Some suspect that factors like early childhood diet and reduced exposure to certain microbes also shape our allergic responses. […] Theories about vitamin D and omega-3 deficiencies are also being explored, with research ongoing.

• #23 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  Our knowledge about the causes of food allergy is still limited. Scientists suspect that environmental factors, including lifestyle and diet, interact with a genetic predisposition to increase the risk of the disease. […] Studies undertaken to identify genetic markers associated with food allergy have often been limited by the size of the studies. One susceptibility locus identified for food allergy (called C11orf30) has also been linked to levels of IgE and asthma. […] The suspected genes include those coding for proteins involved in the immune response, breakdown of food proteins, and integrity of the barriers (skin and mucous membrane) which protect from the allergen exposure. […] Studies of twins suggest that about 80% of the risk for food allergies can be passed from parent to child, but more studies must be carried out to find out more about genetic risk factors.

• #24 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  Our knowledge about the causes of food allergy is still limited. Scientists suspect that environmental factors, including lifestyle and diet, interact with a genetic predisposition to increase the risk of the disease. […] Studies undertaken to identify genetic markers associated with food allergy have often been limited by the size of the studies. One susceptibility locus identified for food allergy (called C11orf30) has also been linked to levels of IgE and asthma. […] The suspected genes include those coding for proteins involved in the immune response, breakdown of food proteins, and integrity of the barriers (skin and mucous membrane) which protect from the allergen exposure. […] Studies of twins suggest that about 80% of the risk for food allergies can be passed from parent to child, but more studies must be carried out to find out more about genetic risk factors.

• #25 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  Our knowledge about the causes of food allergy is still limited. Scientists suspect that environmental factors, including lifestyle and diet, interact with a genetic predisposition to increase the risk of the disease. […] Studies undertaken to identify genetic markers associated with food allergy have often been limited by the size of the studies. One susceptibility locus identified for food allergy (called C11orf30) has also been linked to levels of IgE and asthma. […] The suspected genes include those coding for proteins involved in the immune response, breakdown of food proteins, and integrity of the barriers (skin and mucous membrane) which protect from the allergen exposure. […] Studies of twins suggest that about 80% of the risk for food allergies can be passed from parent to child, but more studies must be carried out to find out more about genetic risk factors.

• #26 What Causes Food Allergy? – Allergic Living

  https://www.allergicliving.com/2010/08/25/what-causes-food-allergy/

  With so many more people affected by food allergies today than in the past, everyone wants to know: what is causing food allergy? […] A food allergy develops when the person with the tendency toward allergy fails to develop a tolerance for one or more specific food proteins. […] While allergy is a largely inherited condition, it doesn’t always develop into the same form of allergy within one family. […] One theory that has gained prominence is the hygiene hypothesis. […] Other theories that attempt to explain a rise in food allergy include insufficient vitamin D, food processing (ie: roasting and emulsification of peanuts for peanut butter, rather than fried or boiled peanuts), and the delay of exposure to the allergen in infancy.

• #27 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  An allergy occurs when your body’s natural defenses overreact to exposure to a particular substance, treating it as an invader and sending out chemicals to defend against it. […] Almost 6% of U.S. adults and children have a food allergy. […] Food allergy symptoms are most common in babies and children, but they can appear at any age. You can even develop an allergy to foods you have eaten for years with no problems. […] A food allergy reaction occurs when your immune system overreacts to a food or a substance in a food, identifying it as a danger and triggering a protective response. […] While allergies tend to run in families, it is impossible to predict whether a child will inherit a parent’s food allergy or whether siblings will have a similar condition. […] Some research does suggest that the younger siblings of a child with a peanut allergy will also be allergic to peanuts.

• #28 Insights into the Etiology, Prevention, and Treatment of Food Allergy | Frontiers Research Topic

  https://www.frontiersin.org/research-topics/6960/insights-into-the-etiology-prevention-and-treatment-of-food-allergy/magazine

  Food allergy is a growing public health concern affecting 6-8% of children and 3-5% of adults with life-threatening potential. […] Environmental factors related to a modern lifestyle have been implicated in the increased prevalence of food allergy in recent years. […] Food allergy can be defined as clinical immune responses to normally harmless food allergens. […] This disease is typically associated with CD4+ T cells that secrete pathogenic T helper (Th) 2 cytokines, and with allergen-specific immunoglobulin (Ig) E antibodies that trigger the release of inflammatory mediators from mast cells and circulating basophils. […] An aberrant response to food allergens can also be non-IgE-mediated. […] Normally, the ingestion of foods results in oral tolerance and therefore, food allergy is thought to be due to a failure of oral tolerance.

• #29 Food allergy | NHS inform

  https://www.nhsinform.scot/illnesses-and-conditions/nutritional/food-allergy/

  Food allergies happen when the immune system the bodys defence against infection mistakenly treats proteins found in food as a threat. […] A food allergy is caused by your immune system handling harmless proteins in certain foods as a threat. It releases a number of chemicals, which trigger an allergic reaction. […] In the most common type of food allergy, an antibody known as immunoglobulin E (IgE) mistakenly targets a certain protein found in food as a threat. IgE can cause several chemicals to be released, the most important being histamine. […] Exactly what causes the immune system to mistake harmless proteins as a threat is unclear. However, a number of risk factors for food allergies have been identified, which are outlined below. […] The number of people with food allergies has risen sharply over the past few decades and, although the reason is unclear, other allergic conditions such as atopic dermatitis have also increased. […] Another theory is that children are increasingly growing up in germ-free environments. This means their immune systems may not receive sufficient early exposure to the germs needed to develop properly. This is known as the hygiene hypothesis.

• #30

  https://www.iowaallergyclinic.com/blog/the-rise-of-food-allergies-causes-and-solutions

  Food allergies have become a growing concern worldwide, with an increasing number of individuals, especially children, affected by them. Understanding the causes behind this rise and finding effective solutions is crucial for managing this public health issue. […] Food allergies occur when the immune system mistakenly identifies a harmless food protein as a threat and mounts an immune response. This can lead to a range of symptoms, from mild hives and itching to severe anaphylaxis, which can be life-threatening. Common food allergens include peanuts, tree nuts, milk, eggs, soy, wheat, fish, and shellfish. […] Family history and genetics play a significant role in the development of food allergies. If one or both parents have allergies, their children are more likely to develop them. […] The Hygiene Hypothesis: The theory suggests that cleaner environments, reduced exposure to infections, and the widespread use of antibiotics may limit the immune systems ability to develop properly, leading to an increased risk of allergies.

• #31 Causes | NICS Well

  https://www.nicswell.co.uk/conditions-and-treatments/food-allergy/causes

  A food allergy is caused by your immune system handling harmless proteins in certain foods as a threat. It releases a number of chemicals, which trigger an allergic reaction. […] Exactly what causes the immune system to mistake harmless proteins as a threat is unclear but some things are thought to increase your risk of a food allergy. […] The number of people with food allergies has risen sharply over the past few decades and, although the reason is unclear, other allergic conditions such as atopic dermatitis have also increased. […] One theory behind the rise is that a typical child’s diet has changed considerably over the last 30 to 40 years. […] Another theory is that children are increasingly growing up in „germ-free” environments. This means their immune systems may not receive sufficient early exposure to the germs needed to develop properly. This is known as the hygiene hypothesis.

• #32 Allergy – Wikipedia

  https://en.wikipedia.org/wiki/Allergy

  The hygiene hypothesis was developed to explain the observation that hay fever and eczema, both allergic diseases, were less common in children from larger families. […] Allergic diseases are more common in industrialized countries than in countries that are more traditional or agricultural, and there is a higher rate of allergic disease in urban populations versus rural populations.

• #33 Causes and Prevention of Food Allergy | NIAID: National Institute of Allergy and Infectious Diseases

  https://www.niaid.nih.gov/diseases-conditions/food-allergy-causes-prevention

  A food allergy develops when a person eats, touches or inhales a protein in food called an allergen, and then the immune system makes a type of antibody against the allergen called IgE. Copies of this IgE antibody move through the blood and attach to two kinds of cells in the immune system. […] Scientists have many basic questions about food allergy. These include: Why do some people develop IgE antibodies to certain foods while other people do not? Why do some people who develop IgE antibodies to a food allergen have no allergic reaction? Why do some people with food allergy have severe allergic reactions, but not others? Researchers are seeking answers to these questions with the hope of finding ways to prevent food allergies or make allergic reactions to food less severe. […] For several decades, health care experts advised parents to avoid giving infants foods that could cause food allergy. But in 2008, the American Academy of Pediatrics decided there was no convincing evidence that delaying giving such foods to infants older than 6 months could prevent food allergy. Finally, the 2015 results of a NIAID-funded study called Learning Early About Peanut Allergy (LEAP) led to a complete reversal of the old advice.

• #34 Causes and Prevention of Food Allergy | NIAID: National Institute of Allergy and Infectious Diseases

  https://www.niaid.nih.gov/diseases-conditions/food-allergy-causes-prevention

  The LEAP study also suggested that developing peanut allergy depends on whether children first get exposed to peanut by eating it or through skin contact. Some infants in the group that avoided peanuts became sensitized to peanut at a young age. The researchers hypothesized that exposure to tiny amounts of peanut through the skin might have caused this sensitization. […] Since then, researchers around the world have conducted studies that found giving infants other allergy-causing foods such as milk and egg may also help prevent food allergy. As a result, many countries are expanding the original guidelines for preventing peanut allergy to include foods beyond peanut.

• #35 Food allergy FAQs – What is food allergy? – Food Allergy Canada

  https://foodallergycanada.ca/food-allergy-basics/food-allergies-101/food-allergy-faqs/

  Food allergy is a public health issue in Canada. […] Avoiding the allergenic food is required to prevent a potentially life-threatening allergic reaction. […] More than 3 million Canadians self-report having at least one food allergy. […] Over 600,000 Canadian children under 18 years have food allergy. […] Peanut allergy in Canada affects about 2 in 100 children. […] Food is one of the most common causes of anaphylaxis, but insect stings, medications, latex, and exercise can also cause reactions. […] There is no easy explanation to explain the prevalence of food allergy. One theory, known as the dual-allergen exposure hypothesis suggests that initial exposure to food allergens through the skin, especially in babies with eczema, can lead to allergy while oral exposure (eating the food) can lead to tolerance.

• #36 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  The updated guidelines are a breakthrough for the prevention of peanut allergy. […] According to the new guidelines, an infant at high risk of developing peanut allergy is one with severe eczema and/or egg allergy. […] The guidelines recommend introduction of peanut-containing foods as early as 4-6 months for high-risk infants who have already started solid foods, after determining that it is safe to do so. […] Most adults with food allergies have had their allergy since they were children. […] Although most food allergies develop when you are a child, they can, rarely, develop as an adult. […] There is no need to assume your child’s food allergy will be lifelong, though for many, this may be the case.

• #37 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  It has been reported that partially digested food proteins may be recognised by the body as invaders and an allergic response will likely develop. Therefore, individuals with reduced stomach acidity (due to medication, stress, vitamin B and zinc deficiency) may be at higher risk of developing food allergy or of aggravation of existing food allergy symptoms. […] Research suggests that microbiota is involved in a range of useful functions such as teaching the gut immune system to recognise foods as harmless. Not surprisingly, any changes in the gut microbiome (e.g. caused by antibiotics) will negatively affect immune tolerance mechanisms and as a result play a significant role in the development of food allergy or aggravation of allergic symptoms. […] It has been suggested that some nutrients may contribute to the development of food allergy: Vitamin D is an important regulator of immune response. Scientists have proposed that both excess and low levels of vitamin D in the body, which are regulated by the sun exposure and dietary intake of the vitamin, may increase the risk of food allergy.

• #38 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  It has been reported that partially digested food proteins may be recognised by the body as invaders and an allergic response will likely develop. Therefore, individuals with reduced stomach acidity (due to medication, stress, vitamin B and zinc deficiency) may be at higher risk of developing food allergy or of aggravation of existing food allergy symptoms. […] Research suggests that microbiota is involved in a range of useful functions such as teaching the gut immune system to recognise foods as harmless. Not surprisingly, any changes in the gut microbiome (e.g. caused by antibiotics) will negatively affect immune tolerance mechanisms and as a result play a significant role in the development of food allergy or aggravation of allergic symptoms. […] It has been suggested that some nutrients may contribute to the development of food allergy: Vitamin D is an important regulator of immune response. Scientists have proposed that both excess and low levels of vitamin D in the body, which are regulated by the sun exposure and dietary intake of the vitamin, may increase the risk of food allergy.

• #39 What Is a Food Allergy? Causes and Symptoms Explained

  https://zoe.com/learn/what-is-a-food-allergy

  Food allergies happen when your bodys immune system mistakes harmless food proteins as dangerous. This can lead to a wide range of symptoms, including rashes, breathing difficulties, and diarrhea. […] It is not clear why some people develop food allergies and others dont. Scientists believe that a combination of a persons genes and their environment contribute to their risk of food allergies. […] Some studies suggest that changes in the gut microbiome occur before someone develops a food allergy, pointing to a link between the microbial inhabitants of your gut and your risk of food allergies. […] Food allergies occur when your immune system mistakes harmless food proteins as dangerous invaders and reacts to them with an immune response. […] There is much that scientists still dont fully understand about food allergies, and diagnostic tests dont always capture the more complex types of food allergy. […] Whether or not you develop food allergies depends on many factors including your genes, your environment, and possibly your microbiome.

• #40 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  It has been reported that partially digested food proteins may be recognised by the body as invaders and an allergic response will likely develop. Therefore, individuals with reduced stomach acidity (due to medication, stress, vitamin B and zinc deficiency) may be at higher risk of developing food allergy or of aggravation of existing food allergy symptoms. […] Research suggests that microbiota is involved in a range of useful functions such as teaching the gut immune system to recognise foods as harmless. Not surprisingly, any changes in the gut microbiome (e.g. caused by antibiotics) will negatively affect immune tolerance mechanisms and as a result play a significant role in the development of food allergy or aggravation of allergic symptoms. […] It has been suggested that some nutrients may contribute to the development of food allergy: Vitamin D is an important regulator of immune response. Scientists have proposed that both excess and low levels of vitamin D in the body, which are regulated by the sun exposure and dietary intake of the vitamin, may increase the risk of food allergy.

• #41 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  It has been reported that partially digested food proteins may be recognised by the body as invaders and an allergic response will likely develop. Therefore, individuals with reduced stomach acidity (due to medication, stress, vitamin B and zinc deficiency) may be at higher risk of developing food allergy or of aggravation of existing food allergy symptoms. […] Research suggests that microbiota is involved in a range of useful functions such as teaching the gut immune system to recognise foods as harmless. Not surprisingly, any changes in the gut microbiome (e.g. caused by antibiotics) will negatively affect immune tolerance mechanisms and as a result play a significant role in the development of food allergy or aggravation of allergic symptoms. […] It has been suggested that some nutrients may contribute to the development of food allergy: Vitamin D is an important regulator of immune response. Scientists have proposed that both excess and low levels of vitamin D in the body, which are regulated by the sun exposure and dietary intake of the vitamin, may increase the risk of food allergy.

• #42 Why food allergies are on the rise

  https://www.bbc.com/future/article/20201023-food-allergies-why-nut-dairy-and-food-allergy-are-rising

  Another factor could be vitamin D. Are we suffering higher food allergy rates because we are spending more and more time indoors, depriving ourselves of vitamin D, which plays an important role in the development of the immunoregulatory mechanisms? […] As research into the rise of food allergies continues, the question remains: how does someone stay safe amid a rise in food allergy cases?

• #43 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  Omega-3 fatty acids regulate immune response and have anti-inflammatory effect protecting the cells from damage. Evidence suggests that omega-3 fatty acids intake has decreased and omega-6 fatty acids intake has increased from ancestral times. This imbalance leads to increased inflammation in the body and can potentially increase the risk of food allergies. […] Folate has been shown to affect immune function, so concerns have been raised on whether taking folate supplements during pregnancy and/or early childhood can increase the risk of developing food allergies. The scientific evidence to confirm this association is lacking and more studies need to be undertaken. […] It has been reported that maternal diet rich in foods containing antioxidants (vitamin C and copper) lowered the risk of developing food allergy in infants. Interestingly, vitamin and mineral supplementation may not have the same protective effect.

• #44 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  Omega-3 fatty acids regulate immune response and have anti-inflammatory effect protecting the cells from damage. Evidence suggests that omega-3 fatty acids intake has decreased and omega-6 fatty acids intake has increased from ancestral times. This imbalance leads to increased inflammation in the body and can potentially increase the risk of food allergies. […] Folate has been shown to affect immune function, so concerns have been raised on whether taking folate supplements during pregnancy and/or early childhood can increase the risk of developing food allergies. The scientific evidence to confirm this association is lacking and more studies need to be undertaken. […] It has been reported that maternal diet rich in foods containing antioxidants (vitamin C and copper) lowered the risk of developing food allergy in infants. Interestingly, vitamin and mineral supplementation may not have the same protective effect.

• #45 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  Omega-3 fatty acids regulate immune response and have anti-inflammatory effect protecting the cells from damage. Evidence suggests that omega-3 fatty acids intake has decreased and omega-6 fatty acids intake has increased from ancestral times. This imbalance leads to increased inflammation in the body and can potentially increase the risk of food allergies. […] Folate has been shown to affect immune function, so concerns have been raised on whether taking folate supplements during pregnancy and/or early childhood can increase the risk of developing food allergies. The scientific evidence to confirm this association is lacking and more studies need to be undertaken. […] It has been reported that maternal diet rich in foods containing antioxidants (vitamin C and copper) lowered the risk of developing food allergy in infants. Interestingly, vitamin and mineral supplementation may not have the same protective effect.

• #46

  https://www.lilmixins.com/pages/causes-of-food-allergies?srsltid=AfmBOoo_iaoDakphm91ltuu5WKY8IjfpkWTFjWPFeut_2Z29_DoiwKsx

  Food allergies are caused by the bodys overreaction to an otherwise harmless protein. […] Even without a clear way to predict food allergies, doctors have learned a lot about what causes a food allergy. […] A few different things have been shown to increase a babys risk of developing a food allergy. Eczema is the biggest risk factor, but the environment, genetics, gut health, and avoiding foods in infancy can also cause food allergies. […] Having eczema (dry, itchy, cracked skin) increases your babys risk of developing an allergy. […] Doctors think that the dry, cracked skin in babies with eczema accidentally lets food, pollen, and animal dander into the body, and this confuses the immune system, resulting in allergies to otherwise harmless things. […] If your babys immune system is exposed to the wrong chemicals and becomes hyper-active, it is more likely to make mistakes, like deciding that cheese is harmful.

• #47

  https://www.lilmixins.com/pages/causes-of-food-allergies?srsltid=AfmBOoo_iaoDakphm91ltuu5WKY8IjfpkWTFjWPFeut_2Z29_DoiwKsx

  Food allergies are caused by the bodys overreaction to an otherwise harmless protein. […] Even without a clear way to predict food allergies, doctors have learned a lot about what causes a food allergy. […] A few different things have been shown to increase a babys risk of developing a food allergy. Eczema is the biggest risk factor, but the environment, genetics, gut health, and avoiding foods in infancy can also cause food allergies. […] Having eczema (dry, itchy, cracked skin) increases your babys risk of developing an allergy. […] Doctors think that the dry, cracked skin in babies with eczema accidentally lets food, pollen, and animal dander into the body, and this confuses the immune system, resulting in allergies to otherwise harmless things. […] If your babys immune system is exposed to the wrong chemicals and becomes hyper-active, it is more likely to make mistakes, like deciding that cheese is harmful.

• #48 Causes and Prevention of Food Allergy | NIAID: National Institute of Allergy and Infectious Diseases

  https://www.niaid.nih.gov/diseases-conditions/food-allergy-causes-prevention

  The LEAP study also suggested that developing peanut allergy depends on whether children first get exposed to peanut by eating it or through skin contact. Some infants in the group that avoided peanuts became sensitized to peanut at a young age. The researchers hypothesized that exposure to tiny amounts of peanut through the skin might have caused this sensitization. […] Since then, researchers around the world have conducted studies that found giving infants other allergy-causing foods such as milk and egg may also help prevent food allergy. As a result, many countries are expanding the original guidelines for preventing peanut allergy to include foods beyond peanut.

• #49 Food Allergies – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK482187/

  Food allergy can have 2 etiology depending on the mechanism of disease: IgE-mediated or type I hypersensitivity and other immunologically non-IgE mediated reactions. […] The food allergens are usually water-soluble glycoproteins that are resistant to breakdown and are easily transported across the mucosal surface in the intestine. […] Risk factors for severe food allergies or anaphylaxis include: Asthma, Prior episodes of anaphylaxis, Delay in the use of epinephrine.

• #50 What Causes Food Allergies? | Rheumatology and Allergy Institute of Connecticut, LLC

  https://allergyinstitute.org/what-causes-food-allergies/

  Food allergies occur when your immune system misinterprets food proteins as a threat to your body. As a result, your immune system triggers the release of various substances into the bloodstream, causing allergy symptoms. […] Although almost any food can cause an allergic reaction, most food allergies are caused by just a few culprits. […] The most common type of food allergy is IgE-mediated food allergy, which is caused by your immune system producing an antibody called immunoglobulin E (IgE). […] Food allergies that arent mediated by immunoglobulin E (non-IgE-mediated food allergies) are caused by other immune system cells. […] Scientists arent sure what causes allergies, but genetics appears to play a significant role. […] People with immune-related conditions like asthma or eczema are also likely to have or develop allergies.

• #51 Food Allergy – Causes, Symptoms & Treatments

  https://humanfocus.co.uk/blog/food-allergy-causes-symptoms-treatments/

  Doctors have found a link between these risk factors and an increased likelihood of developing a food allergy: Family history of food allergies – You’re more likely to develop a food allergy if your family members also suffer from them. Existing allergies – Being allergic to one type of food makes it more likely you’ll develop an allergy to other types. Hay fever – Being allergic to tree and grass pollen can lead to you developing a similar reaction to uncooked fruits and vegetables. Asthma – Asthma attacks are very similar to allergic reactions and it’s common for people with asthma to also have food allergies. Age – Younger children are more susceptible to food allergies. […] Food allergies are more likely to form during early childhood, but you can develop an allergy at any age. […] Theories often link new allergies to hormonal changes that can happen in adulthood, with pregnancy being a good example. Viral infections have also been associated with new allergies, but it’s unclear exactly why.

• #52 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  It has been reported that partially digested food proteins may be recognised by the body as invaders and an allergic response will likely develop. Therefore, individuals with reduced stomach acidity (due to medication, stress, vitamin B and zinc deficiency) may be at higher risk of developing food allergy or of aggravation of existing food allergy symptoms. […] Research suggests that microbiota is involved in a range of useful functions such as teaching the gut immune system to recognise foods as harmless. Not surprisingly, any changes in the gut microbiome (e.g. caused by antibiotics) will negatively affect immune tolerance mechanisms and as a result play a significant role in the development of food allergy or aggravation of allergic symptoms. […] It has been suggested that some nutrients may contribute to the development of food allergy: Vitamin D is an important regulator of immune response. Scientists have proposed that both excess and low levels of vitamin D in the body, which are regulated by the sun exposure and dietary intake of the vitamin, may increase the risk of food allergy.

• #53 Food Allergy Symptoms, Rash, Common List, Testing, Treatment

  https://www.medicinenet.com/food_allergy/article.htm

  They are proteins that usually resist the heat of cooking, the acid in the stomach, and the intestinal digestive enzymes. […] The mechanism of food allergy involves the immune system and heredity. […] The tendency of an individual to produce IgE against something seemingly as innocuous as food appears to be inherited. […] Food allergy is a hypersensitivity reaction, meaning that before an allergic reaction to an allergen in food can occur, a person needs to have been exposed previously, or „sensitized,” to the food. […] The next time the person eats that particular food, its allergen hones in on the specific IgE antibody on the surface of the mast cells and prompts the cells to release chemicals such as histamine. […] Food allergy is caused by immune reactions to foods, sometimes in individuals or families predisposed to allergies.

• #54 Food allergies: Symptoms, treatments, and causes

  https://www.medicalnewstoday.com/articles/14384

  In those with food allergies, the immune system treats a specific protein in a food as a harmful substance that may cause disease. It responds by producing IgE antibodies that will play a role in attacking this protein. […] When the person eats the same food again, the antibodies are ready, so the immune system reacts immediately by releasing histamine and other chemical substances into the bloodstream. These chemicals cause the symptoms of food allergies. […] Histamine causes blood vessels to expand and the skin to become inflamed or swollen. It also affects the nerves, making the skin feel itchy. The nose may produce more mucus, resulting in itching, burning, and a streaming nose.

• #55 Food Allergy Symptoms, Rash, Common List, Testing, Treatment

  https://www.medicinenet.com/food_allergy/article.htm

  They are proteins that usually resist the heat of cooking, the acid in the stomach, and the intestinal digestive enzymes. […] The mechanism of food allergy involves the immune system and heredity. […] The tendency of an individual to produce IgE against something seemingly as innocuous as food appears to be inherited. […] Food allergy is a hypersensitivity reaction, meaning that before an allergic reaction to an allergen in food can occur, a person needs to have been exposed previously, or „sensitized,” to the food. […] The next time the person eats that particular food, its allergen hones in on the specific IgE antibody on the surface of the mast cells and prompts the cells to release chemicals such as histamine. […] Food allergy is caused by immune reactions to foods, sometimes in individuals or families predisposed to allergies.

• #56 Food Allergy and Food Intolerance – Causes, Symptoms, Treatments

  https://www.webmd.com/allergies/food-allergy-intolerances

  A food allergy is caused by your immune system reacting to the food when it doesn’t need to. […] Food allergies are triggered by either IgE or non-IgE proteins and how they affect mast cells, which you have in all body tissues but especially in places like your nose, throat, lungs, skin, and digestive tract. […] The first time you eat a food you’re allergic to, certain cells make a lot of IgE for the part of the food that triggers your allergy, called an allergen. […] The next time you eat that food, the allergen interacts with that IgE and triggers the mast cells to release chemicals such as histamine. […] Non-IgE-mediated food allergies are characterized by a delayed onset of signs and symptoms which can occur over hours to even days following ingestion. […] If you think you have a food allergy, see a doctor to confirm what’s triggering it and get help managing and treating it.

• #57 Allergy Causes | How do People Develop Allergies?

  https://www.nationaljewish.org/conditions/allergy/overview/causes

  To become allergic, a person must have a genetic predisposition for allergy, meaning a personal or family history of allergies. Then they must be exposed to a sensitizing allergen. Most allergies begin in early childhood, and early environmental factors play a major role in the development of allergies. […] When the same allergen is encountered again, it binds directly to the IgE antibody attached to the outside of mast cells. This causes the mast cells to become activated and release chemicals, such as histamine. […] Allergic diseases are caused by the immune system generating needless inflammatory responses to substances that are otherwise harmless. […] An antigen is a substance that generates an immune response. If this response is allergic, the antigen may also be called an allergen. Each allergen has a unique molecular structure. The immune system uses the „blueprint” of this structure to make special proteins called antibodies that fit their corresponding allergens very specifically in a lock-and-key fashion. The antibodies that participate in the allergic response belong to the IgE class. Each IgE antibody is restricted to one allergen, but an individual may have many distinct antibodies that account for multiple allergic susceptibilities.

• #58 Allergy Causes | How do People Develop Allergies?

  https://www.nationaljewish.org/conditions/allergy/overview/causes

  To become allergic, a person must have a genetic predisposition for allergy, meaning a personal or family history of allergies. Then they must be exposed to a sensitizing allergen. Most allergies begin in early childhood, and early environmental factors play a major role in the development of allergies. […] When the same allergen is encountered again, it binds directly to the IgE antibody attached to the outside of mast cells. This causes the mast cells to become activated and release chemicals, such as histamine. […] Allergic diseases are caused by the immune system generating needless inflammatory responses to substances that are otherwise harmless. […] An antigen is a substance that generates an immune response. If this response is allergic, the antigen may also be called an allergen. Each allergen has a unique molecular structure. The immune system uses the „blueprint” of this structure to make special proteins called antibodies that fit their corresponding allergens very specifically in a lock-and-key fashion. The antibodies that participate in the allergic response belong to the IgE class. Each IgE antibody is restricted to one allergen, but an individual may have many distinct antibodies that account for multiple allergic susceptibilities.

• #59 Food Allergy and Food Intolerance – Causes, Symptoms, Treatments

  https://www.webmd.com/allergies/food-allergy-intolerances

  A food allergy is caused by your immune system reacting to the food when it doesn’t need to. […] Food allergies are triggered by either IgE or non-IgE proteins and how they affect mast cells, which you have in all body tissues but especially in places like your nose, throat, lungs, skin, and digestive tract. […] The first time you eat a food you’re allergic to, certain cells make a lot of IgE for the part of the food that triggers your allergy, called an allergen. […] The next time you eat that food, the allergen interacts with that IgE and triggers the mast cells to release chemicals such as histamine. […] Non-IgE-mediated food allergies are characterized by a delayed onset of signs and symptoms which can occur over hours to even days following ingestion. […] If you think you have a food allergy, see a doctor to confirm what’s triggering it and get help managing and treating it.

• #60 Food allergies: Symptoms, treatments, and causes

  https://www.medicalnewstoday.com/articles/14384

  In those with food allergies, the immune system treats a specific protein in a food as a harmful substance that may cause disease. It responds by producing IgE antibodies that will play a role in attacking this protein. […] When the person eats the same food again, the antibodies are ready, so the immune system reacts immediately by releasing histamine and other chemical substances into the bloodstream. These chemicals cause the symptoms of food allergies. […] Histamine causes blood vessels to expand and the skin to become inflamed or swollen. It also affects the nerves, making the skin feel itchy. The nose may produce more mucus, resulting in itching, burning, and a streaming nose.

• #61 Food Allergy Symptoms, Rash, Common List, Testing, Treatment

  https://www.medicinenet.com/food_allergy/article.htm

  They are proteins that usually resist the heat of cooking, the acid in the stomach, and the intestinal digestive enzymes. […] The mechanism of food allergy involves the immune system and heredity. […] The tendency of an individual to produce IgE against something seemingly as innocuous as food appears to be inherited. […] Food allergy is a hypersensitivity reaction, meaning that before an allergic reaction to an allergen in food can occur, a person needs to have been exposed previously, or „sensitized,” to the food. […] The next time the person eats that particular food, its allergen hones in on the specific IgE antibody on the surface of the mast cells and prompts the cells to release chemicals such as histamine. […] Food allergy is caused by immune reactions to foods, sometimes in individuals or families predisposed to allergies.

• #62 Food Allergies – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK482187/

  Food allergy can have 2 etiology depending on the mechanism of disease: IgE-mediated or type I hypersensitivity and other immunologically non-IgE mediated reactions. […] The food allergens are usually water-soluble glycoproteins that are resistant to breakdown and are easily transported across the mucosal surface in the intestine. […] Risk factors for severe food allergies or anaphylaxis include: Asthma, Prior episodes of anaphylaxis, Delay in the use of epinephrine.

• #63 Food allergy – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/food-allergy/symptoms-causes/syc-20355095

  Pollen-food allergy syndrome affects many people who have hay fever. In this condition, certain fresh fruits and vegetables or nuts and spices can trigger an allergic reaction that causes the mouth to tingle or itch. […] Proteins in certain fruits, vegetables, nuts and spices cause the reaction because they’re similar to allergy-causing proteins found in certain pollens. This is an example of cross-reactivity. […] Eating certain foods may cause some people to feel itchy and lightheaded soon after starting to exercise. Serious cases may even involve hives or anaphylaxis. […] A food intolerance or a reaction to another substance you ate may cause the same symptoms as a food allergy does such as nausea, vomiting, cramping and diarrhea. […] Depending on the type of food intolerance you have, you may be able to eat small amounts of problem foods without a reaction. By contrast, if you have a true food allergy, even a tiny amount of the food may trigger an allergic reaction. […] While celiac disease is sometimes referred to as a gluten allergy, it does not result in anaphylaxis. Like a food allergy, celiac disease does involve an immune system response, but it’s a unique reaction that’s more complex than a simple food allergy.

• #64 Food allergy | NHS inform

  https://www.nhsinform.scot/illnesses-and-conditions/nutritional/food-allergy/

  Food allergies happen when the immune system the bodys defence against infection mistakenly treats proteins found in food as a threat. […] A food allergy is caused by your immune system handling harmless proteins in certain foods as a threat. It releases a number of chemicals, which trigger an allergic reaction. […] In the most common type of food allergy, an antibody known as immunoglobulin E (IgE) mistakenly targets a certain protein found in food as a threat. IgE can cause several chemicals to be released, the most important being histamine. […] Exactly what causes the immune system to mistake harmless proteins as a threat is unclear. However, a number of risk factors for food allergies have been identified, which are outlined below. […] The number of people with food allergies has risen sharply over the past few decades and, although the reason is unclear, other allergic conditions such as atopic dermatitis have also increased. […] Another theory is that children are increasingly growing up in germ-free environments. This means their immune systems may not receive sufficient early exposure to the germs needed to develop properly. This is known as the hygiene hypothesis.

• #65 Why food allergies are on the rise

  https://www.bbc.com/future/article/20201023-food-allergies-why-nut-dairy-and-food-allergy-are-rising

  Food allergies can be extremely risky, even fatal and theyre on the rise around the world. […] More of the population has food allergies than ever before and around the world, they are sending more and more people to hospital. […] That food allergies have risen is unquestionably the case, to an absolutely crazy extent, says Graham Rook, emeritus professor of medical microbiology at University College London. […] Nevertheless, looking at data from multiple peer-reviewed sources, Nadeau says that the rate of food allergies worldwide has increased from around 3% of the population in 1960 to around 7% in 2018. […] The range of foods to which people are allergic has also widened. […] Experts agree that food allergies are on the rise. The question is, what explains it? […] The rise of allergies we see is a part of a more generalised phenomenon of a failure of the control mechanisms of the immune system, says Rook.

• #66 Why food allergies are on the rise

  https://www.bbc.com/future/article/20201023-food-allergies-why-nut-dairy-and-food-allergy-are-rising

  Food allergies can be extremely risky, even fatal and theyre on the rise around the world. […] More of the population has food allergies than ever before and around the world, they are sending more and more people to hospital. […] That food allergies have risen is unquestionably the case, to an absolutely crazy extent, says Graham Rook, emeritus professor of medical microbiology at University College London. […] Nevertheless, looking at data from multiple peer-reviewed sources, Nadeau says that the rate of food allergies worldwide has increased from around 3% of the population in 1960 to around 7% in 2018. […] The range of foods to which people are allergic has also widened. […] Experts agree that food allergies are on the rise. The question is, what explains it? […] The rise of allergies we see is a part of a more generalised phenomenon of a failure of the control mechanisms of the immune system, says Rook.

• #67 Why food allergies are on the rise

  https://www.bbc.com/future/article/20201023-food-allergies-why-nut-dairy-and-food-allergy-are-rising

  Food allergies can be extremely risky, even fatal and theyre on the rise around the world. […] More of the population has food allergies than ever before and around the world, they are sending more and more people to hospital. […] That food allergies have risen is unquestionably the case, to an absolutely crazy extent, says Graham Rook, emeritus professor of medical microbiology at University College London. […] Nevertheless, looking at data from multiple peer-reviewed sources, Nadeau says that the rate of food allergies worldwide has increased from around 3% of the population in 1960 to around 7% in 2018. […] The range of foods to which people are allergic has also widened. […] Experts agree that food allergies are on the rise. The question is, what explains it? […] The rise of allergies we see is a part of a more generalised phenomenon of a failure of the control mechanisms of the immune system, says Rook.

• #68 Why food allergies are on the rise

  https://www.bbc.com/future/article/20201023-food-allergies-why-nut-dairy-and-food-allergy-are-rising

  Food allergies can be extremely risky, even fatal and theyre on the rise around the world. […] More of the population has food allergies than ever before and around the world, they are sending more and more people to hospital. […] That food allergies have risen is unquestionably the case, to an absolutely crazy extent, says Graham Rook, emeritus professor of medical microbiology at University College London. […] Nevertheless, looking at data from multiple peer-reviewed sources, Nadeau says that the rate of food allergies worldwide has increased from around 3% of the population in 1960 to around 7% in 2018. […] The range of foods to which people are allergic has also widened. […] Experts agree that food allergies are on the rise. The question is, what explains it? […] The rise of allergies we see is a part of a more generalised phenomenon of a failure of the control mechanisms of the immune system, says Rook.

• #69 Facts and Statistics – FoodAllergy.org

  https://www.foodallergy.org/resources/facts-and-statistics

  Approximately 33 million people in the United States have at least one food allergy. Nearly 11 percent of adults aged 18 or older have at least one food allergy. This is more than 27 million adults. […] Food allergy prevalence among children has been increasing for decades, up by 50 percent between 1997 and 2011, and again up by 50 percent between 2007 and 2021. […] Food allergies may trigger or be linked to eosinophilic gastrointestinal diseases. These are a set of chronic diseases that can affect the entire digestive system from the esophagus to the colon. They happen when a person develops too many white blood cells called eosinophils, which can lead to increased inflammation and damage to the gastrointestinal lining or mucosal. […] Although allergies to milk, egg, wheat, and soy often resolve in childhood, research suggests that children may outgrow at least some of these food sensitivities more slowly than was found in previous decades, with many children still allergic beyond age 5. Allergies to peanuts, tree nuts, and shellfish are generally lifelong.

• #70

  https://www2.hse.ie/conditions/food-allergy/causes/

  A food allergy happens when your immune system treats harmless proteins in foods as a threat. It releases chemicals that trigger an allergic reaction. […] In the most common type of food allergy, an antibody known as immunoglobulin E (IgE) mistakenly targets a certain protein found in food as a threat. […] There’s another type of food allergy known as a non-IgE-mediated food allergy. This is caused by different cells in the immune system. […] It is not clear what causes the immune system to mistake harmless proteins as a threat. Some things are thought to increase your risk of a food allergy. […] The number of people with food allergies has risen sharply over the past few decades. Other allergic conditions such as atopic dermatitis have also increased. […] One theory behind the rise is that a typical child’s diet has changed considerably over the last 30 to 40 years. […] Another theory is that children are growing up in „germ-free” environments. This means their immune systems may not receive enough early exposure to the germs needed to develop properly. This is called the hygiene hypothesis.

• #71 What Causes Food Allergy? – Allergic Living

  https://www.allergicliving.com/2010/08/25/what-causes-food-allergy/

  With so many more people affected by food allergies today than in the past, everyone wants to know: what is causing food allergy? […] A food allergy develops when the person with the tendency toward allergy fails to develop a tolerance for one or more specific food proteins. […] While allergy is a largely inherited condition, it doesn’t always develop into the same form of allergy within one family. […] One theory that has gained prominence is the hygiene hypothesis. […] Other theories that attempt to explain a rise in food allergy include insufficient vitamin D, food processing (ie: roasting and emulsification of peanuts for peanut butter, rather than fried or boiled peanuts), and the delay of exposure to the allergen in infancy.

• #72 Eczema and Food Allergy – Australasian Society of Clinical Immunology and Allergy (ASCIA)

  https://www.allergy.org.au/patients/fast-facts/eczema-and-food-allergy

  Eczema, also known as atopic dermatitis, is a chronic health condition that affects the skin causing redness, itching and sometimes infections. People with eczema often have other allergic conditions, including food allergy, but food allergy does not cause eczema. […] Food allergy is more common in infants with eczema and a family history of allergy. Around 30% of infants in these groups develop food allergy compared to only 10% in the general population. There is some evidence that managing eczema well during infancy may reduce the chance of an infant developing food allergy. […] When a child has eczema and food allergy, food allergy may trigger eczema, but is not the cause of their eczema. Most food allergy causes symptoms within 30 minutes of eating, including hives, vomiting and irritability. Food allergy only occasionally results in delayed eczema flare ups.

• #73 Facts and Statistics – FoodAllergy.org

  https://www.foodallergy.org/resources/facts-and-statistics

  Approximately 33 million people in the United States have at least one food allergy. Nearly 11 percent of adults aged 18 or older have at least one food allergy. This is more than 27 million adults. […] Food allergy prevalence among children has been increasing for decades, up by 50 percent between 1997 and 2011, and again up by 50 percent between 2007 and 2021. […] Food allergies may trigger or be linked to eosinophilic gastrointestinal diseases. These are a set of chronic diseases that can affect the entire digestive system from the esophagus to the colon. They happen when a person develops too many white blood cells called eosinophils, which can lead to increased inflammation and damage to the gastrointestinal lining or mucosal. […] Although allergies to milk, egg, wheat, and soy often resolve in childhood, research suggests that children may outgrow at least some of these food sensitivities more slowly than was found in previous decades, with many children still allergic beyond age 5. Allergies to peanuts, tree nuts, and shellfish are generally lifelong.

• #74 Food Allergies – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK482187/

  Food allergy can have 2 etiology depending on the mechanism of disease: IgE-mediated or type I hypersensitivity and other immunologically non-IgE mediated reactions. […] The food allergens are usually water-soluble glycoproteins that are resistant to breakdown and are easily transported across the mucosal surface in the intestine. […] Risk factors for severe food allergies or anaphylaxis include: Asthma, Prior episodes of anaphylaxis, Delay in the use of epinephrine.

• #75 Food Allergies: Causes, Common Examples & Cures

  https://my.clevelandclinic.org/health/diseases/9196-food-allergies

  Food allergies are caused by your immune system trying to protect you from something it mistakenly thinks is harmful. […] Food allergies are reactions your body has to a food that it mistakenly thinks is harmful. […] When you have a food allergy, your immune system mistakenly identifies a food protein as something harmful (as if it were a virus or bacteria). […] The most serious complication of food allergies is anaphylaxis, or swelling in multiple body systems that can cause uncontrolled vomiting, difficulty breathing and a severe drop in blood pressure (anaphylactic shock).

• #76 Banana Allergy | Anaphylaxis UK

  https://www.anaphylaxis.org.uk/fact-sheet/banana/

  Rarely, people can be allergic to bananas even if they are not allergic to pollen or natural rubber latex. People with this type are more likely to have serious allergic reactions. […] The term for this more serious reaction is anaphylaxis. […] Most healthcare professionals consider an allergic reaction to be anaphylaxis when it involves difficulty breathing or affects the heart rhythm or blood pressure. […] Banana allergies can be diagnosed with specialised allergy tests. […] In all cases of banana allergy, it’s important to avoid bananas, but it is essential if you have a serious allergy. […] If you are allergic to bananas, cross-reactivity with latex may mean you also react to avocado, kiwi or chestnut.

• #77 Banana Allergy | Anaphylaxis UK

  https://www.anaphylaxis.org.uk/fact-sheet/banana/

  Rarely, people can be allergic to bananas even if they are not allergic to pollen or natural rubber latex. People with this type are more likely to have serious allergic reactions. […] The term for this more serious reaction is anaphylaxis. […] Most healthcare professionals consider an allergic reaction to be anaphylaxis when it involves difficulty breathing or affects the heart rhythm or blood pressure. […] Banana allergies can be diagnosed with specialised allergy tests. […] In all cases of banana allergy, it’s important to avoid bananas, but it is essential if you have a serious allergy. […] If you are allergic to bananas, cross-reactivity with latex may mean you also react to avocado, kiwi or chestnut.

• #78 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  Learning about patterns of cross-reactivity and what must be avoided is one of the reasons why people with food allergies should receive care from a board-certified allergist. […] The most common food allergens in adults are: Fruit and vegetable pollen (oral allergy syndrome), Peanuts and tree nuts, Fish and shellfish. […] Once a food allergy is diagnosed, the most effective treatment is to avoid the food. […] Children may outgrow their allergic reactions to milk and to eggs. Peanut and tree nut allergies are likely to persist. […] Allergic reactions to food can affect the skin, respiratory tract, gastrointestinal tract and cardiovascular system. […] It is impossible to predict how severe the next reaction might be, and all patients with food allergies should be carefully counseled about the risk of anaphylaxis, a potentially fatal reaction that is treated with epinephrine (adrenaline).

• #79 Food allergy – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/food-allergy/symptoms-causes/syc-20355095

  Food allergy is an immune system reaction that happens soon after eating a certain food. […] When you have a food allergy, your immune system mistakenly identifies a specific food or a substance in food as something harmful. In response, your immune system triggers cells to make an antibody known as immunoglobulin E (IgE) to recognize the allergy-causing food or food substance, called an allergen. […] The next time you eat even the smallest amount of that food, IgE antibodies sense it. They then signal your immune system to release a chemical called histamine, as well as other chemicals, into your bloodstream. These chemicals cause allergy symptoms. […] Most food allergies are triggered by certain proteins in: Crustacean shellfish, such as shrimp, lobster and crab; Peanuts; Tree nuts, such as walnuts and pecans; Fish; Chicken eggs; Cow’s milk; Wheat; Soy.

• #80 Food Allergies: Causes, Common Examples & Cures

  https://my.clevelandclinic.org/health/diseases/9196-food-allergies

  Food allergies are caused by your immune system trying to protect you from something it mistakenly thinks is harmful. […] Food allergies are reactions your body has to a food that it mistakenly thinks is harmful. […] When you have a food allergy, your immune system mistakenly identifies a food protein as something harmful (as if it were a virus or bacteria). […] The most serious complication of food allergies is anaphylaxis, or swelling in multiple body systems that can cause uncontrolled vomiting, difficulty breathing and a severe drop in blood pressure (anaphylactic shock).

• #81 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  Our knowledge about the causes of food allergy is still limited. Scientists suspect that environmental factors, including lifestyle and diet, interact with a genetic predisposition to increase the risk of the disease. […] Studies undertaken to identify genetic markers associated with food allergy have often been limited by the size of the studies. One susceptibility locus identified for food allergy (called C11orf30) has also been linked to levels of IgE and asthma. […] The suspected genes include those coding for proteins involved in the immune response, breakdown of food proteins, and integrity of the barriers (skin and mucous membrane) which protect from the allergen exposure. […] Studies of twins suggest that about 80% of the risk for food allergies can be passed from parent to child, but more studies must be carried out to find out more about genetic risk factors.

• #82 Food Allergies | Causes, Symptoms & Treatment | ACAAI Public Website

  https://acaai.org/allergies/allergic-conditions/food/

  An allergy occurs when your body’s natural defenses overreact to exposure to a particular substance, treating it as an invader and sending out chemicals to defend against it. […] Almost 6% of U.S. adults and children have a food allergy. […] Food allergy symptoms are most common in babies and children, but they can appear at any age. You can even develop an allergy to foods you have eaten for years with no problems. […] A food allergy reaction occurs when your immune system overreacts to a food or a substance in a food, identifying it as a danger and triggering a protective response. […] While allergies tend to run in families, it is impossible to predict whether a child will inherit a parent’s food allergy or whether siblings will have a similar condition. […] Some research does suggest that the younger siblings of a child with a peanut allergy will also be allergic to peanuts.

• #83

  https://www.iowaallergyclinic.com/blog/the-rise-of-food-allergies-causes-and-solutions

  Food allergies have become a growing concern worldwide, with an increasing number of individuals, especially children, affected by them. Understanding the causes behind this rise and finding effective solutions is crucial for managing this public health issue. […] Food allergies occur when the immune system mistakenly identifies a harmless food protein as a threat and mounts an immune response. This can lead to a range of symptoms, from mild hives and itching to severe anaphylaxis, which can be life-threatening. Common food allergens include peanuts, tree nuts, milk, eggs, soy, wheat, fish, and shellfish. […] Family history and genetics play a significant role in the development of food allergies. If one or both parents have allergies, their children are more likely to develop them. […] The Hygiene Hypothesis: The theory suggests that cleaner environments, reduced exposure to infections, and the widespread use of antibiotics may limit the immune systems ability to develop properly, leading to an increased risk of allergies.

• #84 Food Allergens | Causes of food allergy

  https://sites.manchester.ac.uk/foodallergens/allergy-facts/causes-of-food-allergy/

  It has been reported that partially digested food proteins may be recognised by the body as invaders and an allergic response will likely develop. Therefore, individuals with reduced stomach acidity (due to medication, stress, vitamin B and zinc deficiency) may be at higher risk of developing food allergy or of aggravation of existing food allergy symptoms. […] Research suggests that microbiota is involved in a range of useful functions such as teaching the gut immune system to recognise foods as harmless. Not surprisingly, any changes in the gut microbiome (e.g. caused by antibiotics) will negatively affect immune tolerance mechanisms and as a result play a significant role in the development of food allergy or aggravation of allergic symptoms. […] It has been suggested that some nutrients may contribute to the development of food allergy: Vitamin D is an important regulator of immune response. Scientists have proposed that both excess and low levels of vitamin D in the body, which are regulated by the sun exposure and dietary intake of the vitamin, may increase the risk of food allergy.

• #85 Understanding Food Allergies: Causes, Symptoms, and Prevention

  https://blog.gale.com/understanding-food-allergies-causes-symptoms-and-prevention/

  Unfortunately, there’s no cure for food allergies yet. The only proven strategy is strict avoidance of the triggering food. […] Ongoing medical research is also exploring promising therapies like oral immunotherapy, which involves gradually introducing small amounts of an allergen under medical supervision to build tolerance. […] We now know that early introduction of potentially allergenic foods, usually at around four to six months of age, can help prevent allergies from developing in the first place. […] This shift in thinking has major implications. Rather than avoiding allergenic foods, we now have a window of opportunity to build tolerance early—something that could change the trajectory of a child’s health. […] Food allergies aren’t something to take lightly. They can affect every meal, every snack, and every social situation that involves food. […] More good news is that prevention strategies are evolving. What once seemed like an inevitability—living with food allergies for life—is now being challenged with new research-backed approaches.

• #86 Food allergy | NHS inform

  https://www.nhsinform.scot/illnesses-and-conditions/nutritional/food-allergy/

  Food allergies happen when the immune system the bodys defence against infection mistakenly treats proteins found in food as a threat. […] A food allergy is caused by your immune system handling harmless proteins in certain foods as a threat. It releases a number of chemicals, which trigger an allergic reaction. […] In the most common type of food allergy, an antibody known as immunoglobulin E (IgE) mistakenly targets a certain protein found in food as a threat. IgE can cause several chemicals to be released, the most important being histamine. […] Exactly what causes the immune system to mistake harmless proteins as a threat is unclear. However, a number of risk factors for food allergies have been identified, which are outlined below. […] The number of people with food allergies has risen sharply over the past few decades and, although the reason is unclear, other allergic conditions such as atopic dermatitis have also increased. […] Another theory is that children are increasingly growing up in germ-free environments. This means their immune systems may not receive sufficient early exposure to the germs needed to develop properly. This is known as the hygiene hypothesis.

• #87 Why food allergies are on the rise

  https://www.bbc.com/future/article/20201023-food-allergies-why-nut-dairy-and-food-allergy-are-rising

  Food allergies can be extremely risky, even fatal and theyre on the rise around the world. […] More of the population has food allergies than ever before and around the world, they are sending more and more people to hospital. […] That food allergies have risen is unquestionably the case, to an absolutely crazy extent, says Graham Rook, emeritus professor of medical microbiology at University College London. […] Nevertheless, looking at data from multiple peer-reviewed sources, Nadeau says that the rate of food allergies worldwide has increased from around 3% of the population in 1960 to around 7% in 2018. […] The range of foods to which people are allergic has also widened. […] Experts agree that food allergies are on the rise. The question is, what explains it? […] The rise of allergies we see is a part of a more generalised phenomenon of a failure of the control mechanisms of the immune system, says Rook.

• #88 Understanding Food Allergies: Causes, Symptoms, and Prevention

  https://blog.gale.com/understanding-food-allergies-causes-symptoms-and-prevention/

  Unfortunately, there’s no cure for food allergies yet. The only proven strategy is strict avoidance of the triggering food. […] Ongoing medical research is also exploring promising therapies like oral immunotherapy, which involves gradually introducing small amounts of an allergen under medical supervision to build tolerance. […] We now know that early introduction of potentially allergenic foods, usually at around four to six months of age, can help prevent allergies from developing in the first place. […] This shift in thinking has major implications. Rather than avoiding allergenic foods, we now have a window of opportunity to build tolerance early—something that could change the trajectory of a child’s health. […] Food allergies aren’t something to take lightly. They can affect every meal, every snack, and every social situation that involves food. […] More good news is that prevention strategies are evolving. What once seemed like an inevitability—living with food allergies for life—is now being challenged with new research-backed approaches.

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