Materiały źródłowe

• #1 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #2 Alcohol Intolerance: Symptoms, Tests & Alcohol Allergy

  https://my.clevelandclinic.org/health/diseases/17659-alcohol-intolerance

  Alcohol intolerance is an inherited metabolic disorder. Metabolic disorders affect your metabolism, the way your body converts and uses energy. An inherited metabolic disorder means you got this condition from your parents they each passed down a mutated (changed) gene that resulted in this disorder. Alcohol intolerance is a problem with the specific enzyme that helps your body metabolize alcohol. Even drinking a small amount of alcohol (ethanol) causes unpleasant symptoms. In people with alcohol intolerance, a genetic mutation (change) makes ALDH2 less active or inactive. As a result, your body cant convert acetaldehyde to acetic acid. Acetaldehyde starts to build up in your blood and tissues, causing symptoms.

• #3 Alcohol intolerance – Wikipedia

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

  This deficiency contributes to alcohol intolerance by impairing the breakdown of acetaldehyde, a toxic intermediate produced during alcohol metabolism. […] Changes in DNA methylation at the ALDH2 gene’s CpG sites can reduce enzyme activity. […] Lower methylation at these sites reduces ALDH2 production, intensifying alcohol intolerance symptoms like facial flushing, headaches, and rapid heartbeat. […] Chronic alcohol exposure can itself cause epigenetic modifications, altering the expression of genes involved in alcohol metabolism, including ALDH2. […] For individuals with ALDH2 deficiencies, these epigenetic changes can worsen the body’s ability to break down acetaldehyde, resulting in more frequent or severe symptoms over time. […] Alcohol intolerance is not an allergy. […] Alcohol intolerance is an inherited genetic disorder that impairs alcohol metabolism.

• #4 Alcohol Intolerance: Symptoms and Causes

  https://grovetreatment.com/addiction/alcohol/intolerance/

  Alcohol intolerance involves a variety of physical responses due to the body’s inability to fully metabolize alcohol. […] The main causes of Alcohol Intolerance involve genetic factors, particularly deficiencies in Aldehyde Dehydrogenase (ALDH2), an enzyme important for breaking down alcohol. […] The mechanism behind alcohol intolerance is metabolic rather than immune-based, which differentiates it from an Alcohol Allergy. […] Alcohol intolerance does not involve immunoglobulin E (IgE) antibodies, which are active in allergic reactions, meaning that it is not a true allergic response. […] Deficiency in Aldehyde Dehydrogenase (ALDH2) is a major cause of alcohol intolerance, leading to an inability to efficiently process acetaldehyde. […] In individuals with ALDH2 deficiency, this acetaldehyde remains in the bloodstream, causing immediate symptoms like nausea, facial flushing, and dizziness. […] Genetic factors are a primary cause of Alcohol Intolerance, especially among individuals of East Asian descent. […] These genetic mutations make people more susceptible to symptoms even with small amounts of alcohol.

• #5 Alcohol Intolerance: Definition, Causes, Symptoms, Test, And Remedy

  https://whitelightbh.com/resources/alcohol/alcohol-intolerance/

  Alcohol intolerance refers to the bodys inability to effectively metabolize alcohol and is a condition that affects a significant portion of the population. […] The primary cause of alcohol intolerance is genetic. Individuals with this condition lack sufficient levels of the enzyme aldehyde dehydrogenase 2 (ALDH2), which is necessary for breaking down ethanol in alcohol. […] Without enough ALDH2, toxic byproducts like acetaldehyde accumulate in the body, leading to various adverse reactions. […] Alcohol intolerance is a genetic metabolic disorder, which means its passed down from your parents. […] This specific disorder arises from an issue with the enzyme responsible for metabolizing alcohol (ALDH2). […] Alcohol intolerance is largely determined by genetics, affecting how the body processes alcohol.

• #6 Alcohol Intolerance: Definition, Causes, Symptoms, Test and Remedy. – Better Life Recovery

  https://www.betterliferecovery.com/addiction/physical/alcohol-intolerance/

  Alcohol intolerance is a genetic disorder characterized by missing enzymes in the body, specifically the aldehyde dehydrogenase 2 (ALDH2) enzyme, essential for breaking down acetaldehyde, a byproduct of alcohol metabolism. […] Alcohol intolerance is primarily caused by a genetic mutation that results in the bodys inability to metabolize acetaldehyde efficiently. […] One of the most well-known genetic factors contributing to alcohol intolerance is ALDH2 deficiency. ALDH2 is an enzyme responsible for metabolizing acetaldehyde, a toxic byproduct of alcohol metabolism. Individuals with ALDH2 deficiency have reduced enzyme activity, leading to the accumulation of acetaldehyde, which cause facial flushing, rapid heartbeat, nausea, and other symptoms. […] Apart from ALDH2 deficiency, deficiencies in other alcohol-metabolizing enzymes, such as alcohol dehydrogenase (ADH), also influence alcohol intolerance. ADH is involved in converting alcohol into acetaldehyde, and a lack of this enzyme means slower alcohol metabolism and increased sensitivity to alcohols effects.

• #7 Alcohol Intolerance: Symptoms, Tests & Alcohol Allergy

  https://my.clevelandclinic.org/health/diseases/17659-alcohol-intolerance

  Alcohol intolerance is an inherited metabolic disorder. Metabolic disorders affect your metabolism, the way your body converts and uses energy. An inherited metabolic disorder means you got this condition from your parents they each passed down a mutated (changed) gene that resulted in this disorder. Alcohol intolerance is a problem with the specific enzyme that helps your body metabolize alcohol. Even drinking a small amount of alcohol (ethanol) causes unpleasant symptoms. In people with alcohol intolerance, a genetic mutation (change) makes ALDH2 less active or inactive. As a result, your body cant convert acetaldehyde to acetic acid. Acetaldehyde starts to build up in your blood and tissues, causing symptoms.

• #8 Alcohol intolerance – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/alcohol-intolerance/symptoms-causes/syc-20369211

  Alcohol intolerance is caused by a genetic condition in which the body can’t break down alcohol efficiently. […] Alcohol intolerance occurs when your body doesn’t have the proper enzymes to break down (metabolize) the toxins in alcohol. This is caused by inherited (genetic) traits most often found in Asians. […] In some cases, reactions can be triggered by a true allergy to a grain such as corn, wheat or rye or to another substance in alcoholic beverages.

• #9 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #10 Alcohol Intolerance: Definition, Causes, Symptoms, Test, And Remedy

  https://whitelightbh.com/resources/alcohol/alcohol-intolerance/

  Certain ethnic groups, particularly East Asians, exhibit a notably higher incidence of aldehyde dehydrogenase 2 (ALDH2) deficiency. […] One of the primary causes of alcohol intolerance is the deficiency or reduced activity of the enzyme aldehyde dehydrogenase (ALDH). […] When ALDH is deficient, acetaldehyde builds up in the body, leading to the symptoms associated with alcohol intolerance. […] Alcohol intolerance is primarily caused by the bodys inability to metabolize or process alcohol efficiently. It is often related to a deficiency in the enzyme aldehyde dehydrogenase (ALDH) or an inability to break down acetaldehyde, a byproduct of alcohol metabolism. […] Alcohol intolerance is primarily a reaction to the direct effects of alcohol or its metabolites, such as acetaldehyde, on the body.

• #11

  https://www.omim.org/entry/610251

  To study the mechanism by which the ALDH2*2 allele exerts its dominant effect in decreasing ALDH2 activity in liver extracts and producing cutaneous flushing when the subject drinks alcohol, Xiao et al. (1995) cloned ALDH2*1 cDNA and generated the ALDH2*2 allele by site-directed mutagenesis. These cDNAs were transduced using retroviral vectors into HeLa and CV1 cells, which do not express ALDH2. The normal allele directed synthesis of immunoreactive ALDH2 protein with the expected isoelectric point and increased aldehyde dehydrogenase activity. The ALDH2*2 allele directed synthesis of mRNA and immunoreactive protein, but the protein lacked enzymatic activity. When ALDH2*1-expressing cells were transduced with ALDH2*2 vectors, both mRNAs were expressed and immunoreactive proteins with isoelectric points ranging between those of the 2 gene products were present, indicating that the subunits formed heteromers. ALDH2 activity in these cells was reduced below that of the parental ALDH2*1-expressing cells. Thus, the authors concluded that ALDH2*2 allele is sufficient to cause ALDH2 deficiency in vitro.

• #12 Alcohol Intolerance: Definition, Causes, Symptoms, Test and Remedy. – Better Life Recovery

  https://www.betterliferecovery.com/addiction/physical/alcohol-intolerance/

  Alcohol intolerance is a genetic disorder characterized by missing enzymes in the body, specifically the aldehyde dehydrogenase 2 (ALDH2) enzyme, essential for breaking down acetaldehyde, a byproduct of alcohol metabolism. […] Alcohol intolerance is primarily caused by a genetic mutation that results in the bodys inability to metabolize acetaldehyde efficiently. […] One of the most well-known genetic factors contributing to alcohol intolerance is ALDH2 deficiency. ALDH2 is an enzyme responsible for metabolizing acetaldehyde, a toxic byproduct of alcohol metabolism. Individuals with ALDH2 deficiency have reduced enzyme activity, leading to the accumulation of acetaldehyde, which cause facial flushing, rapid heartbeat, nausea, and other symptoms. […] Apart from ALDH2 deficiency, deficiencies in other alcohol-metabolizing enzymes, such as alcohol dehydrogenase (ADH), also influence alcohol intolerance. ADH is involved in converting alcohol into acetaldehyde, and a lack of this enzyme means slower alcohol metabolism and increased sensitivity to alcohols effects.

• #13 What Is Sudden Onset Alcohol Intolerance? Symptoms, Causes & Treatment | The Recovery Village Drug and Alcohol Rehab

  https://www.therecoveryvillage.com/alcohol-abuse/can-you-develop-onset-alcohol-intolerance/

  Alcohol intolerance means your body has difficulty processing alcohol. In particular, it struggles to break down acetaldehyde a toxic byproduct of alcohol metabolism. […] A variety of factors can cause or contribute to sudden onset alcohol intolerance. Some of the most common include: Enzyme Deficiencies or Changes: The body relies on enzymes like alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) to break down alcohol. Genetic variations can alter how these enzymes function, leading to an increased buildup of acetaldehyde. […] Hormonal Changes: Shifts in hormone levels sometimes related to menopause or endocrine disorders may affect how the body processes alcohol. While the exact mechanisms are still being studied, fluctuations in hormones can influence digestive enzymes and immune responses, potentially triggering or worsening alcohol intolerance.

• #14 Ask the Expert: Alcohol Intolerance – Today’s Dietitian Magazine

  https://www.todaysdietitian.com/newarchives/0418p10.shtml

  A: There is, in fact, a genetic condition known as alcohol intolerance in which the body can’t break down alcohol efficiently. […] The Chemistry of Alcohol Intolerance Taylor Wallace, PhD, CFS, FACN, principal consultant and CEO at the Think Healthy Group and an affiliate professor in the department of nutrition and food studies at George Mason University, explains the mechanism of action in those with alcohol intolerance: There are two enzymes involved with the proper breakdown of alcohol including alcohol dehydrogenase (which breaks down alcohol into acetaldehyde) and acetaldehyde dehydrogenase (which breaks down acetaldehydes into acetic acid). Individuals with alcohol intolerance are more likely to produce lower levels of acetaldehyde dehydrogenase, which leads to buildup of toxic acetaldehydes in the bloodstream and causes migraines or an allergic response (eg, red flushing of the face/skin). […] Other symptoms of alcohol intolerance include diarrhea, hot flashes, heartburn, hives, rash, heart palpitations, low blood pressure, stuffy nose, and trouble breathing.

• #15 Alcohol allergy – Australasian Society of Clinical Immunology and Allergy (ASCIA)

  https://www.allergy.org.au/patients/other-allergy/alcohol-allergy

  Alcohol is processed in the body by the liver. The alcohol that we consume is broken down and converted to a chemical called acetaldehyde. Acetaldehyde is then transformed by the body to acetic acid (vinegar). Problems occur if alcohol cannot be broken down properly as acetaldehyde can build up and cause adverse effects. […] Another cause of asthma symptoms can be acetaldehyde which may build up when the body cannot break down alcohol properly. […] Consuming alcohol in large amounts (alcohol toxicity), can have negative effects on the liver, stomach, brain and mental functioning. None of these reactions are caused by allergy.

• #16

  https://www.omim.org/entry/610251

  Xiao et al. (1996) referred to the ALDH2 enzyme encoded by the ALDH2*1 allele (the wildtype form) as ALDH2E and the enzyme subunit encoded by ALDH2*2 as ALDH2K. They found that the ALDH2E enzyme was very stable, with a half-life of at least 22 hours. ALDH2K, on the other hand, had an enzyme half-life of only 14 hours. In cells expressing both subunits, most of the subunits assemble as heterotetramers, and these enzymes had a half-life of 13 hours. Thus, the effect of ALDH2K on enzyme turnover is dominant. Their studies indicated that ALDH2*2 exerts its dominant effect both by interfering with the catalytic activity of the enzyme and by increasing its turnover. […] Because genetic epidemiologic studies have suggested a mechanism by which homozygosity for the ALDH2*2 allele inhibits the development of alcoholism in Asians, Peng et al. (1999) recruited 18 adult Han Chinese men, matched by age, body-mass index, nutritional state, and homozygosity at the ALDH2 gene loci from a population of 273 men. Six individuals were chosen for each of the 3 ALDH2 allotypes, i.e., 2 homozygotes and 1 heterozygote. Following a low dose of ethanol, homozygous ALDH2*2 individuals were found to be strikingly responsive with pronounced cardiovascular hemodynamic effects as well as subjective perception of general discomfort for as long as 2 hours following ingestion.

• #17

  https://www.omim.org/entry/610251

  To study the mechanism by which the ALDH2*2 allele exerts its dominant effect in decreasing ALDH2 activity in liver extracts and producing cutaneous flushing when the subject drinks alcohol, Xiao et al. (1995) cloned ALDH2*1 cDNA and generated the ALDH2*2 allele by site-directed mutagenesis. These cDNAs were transduced using retroviral vectors into HeLa and CV1 cells, which do not express ALDH2. The normal allele directed synthesis of immunoreactive ALDH2 protein with the expected isoelectric point and increased aldehyde dehydrogenase activity. The ALDH2*2 allele directed synthesis of mRNA and immunoreactive protein, but the protein lacked enzymatic activity. When ALDH2*1-expressing cells were transduced with ALDH2*2 vectors, both mRNAs were expressed and immunoreactive proteins with isoelectric points ranging between those of the 2 gene products were present, indicating that the subunits formed heteromers. ALDH2 activity in these cells was reduced below that of the parental ALDH2*1-expressing cells. Thus, the authors concluded that ALDH2*2 allele is sufficient to cause ALDH2 deficiency in vitro.

• #18 Alcohol intolerance – Wikipedia

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

  Higher blood acetaldehyde levels have been associated with facial flushing caused by an increase in heart rate and blood flow to the face from vasodilation of the blood vessels. […] Individuals that have the ALDH2*2 allele, a variant that has a mutation when compared to the wild-type ALDH2 isozyme, are known to have higher blood acetaldehyde levels. […] Individuals that have either mutation in the ALDH1 or ALDH2 genes may have slightly different blood acetaldehyde levels among others carrying a similar mutation and may experience varying degrees of alcohol intolerance symptoms. […] Epigenetic factors, which are heritable changes in gene expression that do not involve alterations to the DNA sequence, can play a significant role in the deficiency of aldehyde dehydrogenase 2 (ALDH2), a key enzyme in metabolizing alcohol.

• #19 Alcohol intolerance – Wikipedia

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

  Higher blood acetaldehyde levels have been associated with facial flushing caused by an increase in heart rate and blood flow to the face from vasodilation of the blood vessels. […] Individuals that have the ALDH2*2 allele, a variant that has a mutation when compared to the wild-type ALDH2 isozyme, are known to have higher blood acetaldehyde levels. […] Individuals that have either mutation in the ALDH1 or ALDH2 genes may have slightly different blood acetaldehyde levels among others carrying a similar mutation and may experience varying degrees of alcohol intolerance symptoms. […] Epigenetic factors, which are heritable changes in gene expression that do not involve alterations to the DNA sequence, can play a significant role in the deficiency of aldehyde dehydrogenase 2 (ALDH2), a key enzyme in metabolizing alcohol.

• #20 Alcohol intolerance – Wikipedia

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

  Higher blood acetaldehyde levels have been associated with facial flushing caused by an increase in heart rate and blood flow to the face from vasodilation of the blood vessels. […] Individuals that have the ALDH2*2 allele, a variant that has a mutation when compared to the wild-type ALDH2 isozyme, are known to have higher blood acetaldehyde levels. […] Individuals that have either mutation in the ALDH1 or ALDH2 genes may have slightly different blood acetaldehyde levels among others carrying a similar mutation and may experience varying degrees of alcohol intolerance symptoms. […] Epigenetic factors, which are heritable changes in gene expression that do not involve alterations to the DNA sequence, can play a significant role in the deficiency of aldehyde dehydrogenase 2 (ALDH2), a key enzyme in metabolizing alcohol.

• #21 Alcohol Intolerance: Definition, Causes, Symptoms, Test and Remedy. – Better Life Recovery

  https://www.betterliferecovery.com/addiction/physical/alcohol-intolerance/

  Alcohol intolerance is a genetic disorder characterized by missing enzymes in the body, specifically the aldehyde dehydrogenase 2 (ALDH2) enzyme, essential for breaking down acetaldehyde, a byproduct of alcohol metabolism. […] Alcohol intolerance is primarily caused by a genetic mutation that results in the bodys inability to metabolize acetaldehyde efficiently. […] One of the most well-known genetic factors contributing to alcohol intolerance is ALDH2 deficiency. ALDH2 is an enzyme responsible for metabolizing acetaldehyde, a toxic byproduct of alcohol metabolism. Individuals with ALDH2 deficiency have reduced enzyme activity, leading to the accumulation of acetaldehyde, which cause facial flushing, rapid heartbeat, nausea, and other symptoms. […] Apart from ALDH2 deficiency, deficiencies in other alcohol-metabolizing enzymes, such as alcohol dehydrogenase (ADH), also influence alcohol intolerance. ADH is involved in converting alcohol into acetaldehyde, and a lack of this enzyme means slower alcohol metabolism and increased sensitivity to alcohols effects.

• #22 Alcohol intolerance: symptoms, causes, and risk factors – The Diamond Rehab Thailand

  https://diamondrehabthailand.com/alcohol-intolerance/

  Alcohol intolerance is a condition bringing about unpleasant symptoms because the body has difficulty breaking down alcohol. The disorder results from a hereditary enzyme deficiency or inability to metabolize specific alcohol components including sulfites or histamines. […] Alcohol intolerance is a metabolic condition where the body experiences an immediate reaction following alcohol consumption due to the bodys inability to correctly process the substance. The problem frequently results from a genetic enzyme shortage, namely a lack of aldehyde dehydrogenase 2 (ALDH2), which is essential for the breakdown of acetaldehyde, a hazardous byproduct of alcohol. […] Alcohol metabolism plays a significant role in such reactions, as the bodys inability to break down alcohol components efficiently leads to persistent intolerance symptoms. Unlike a true allergic response involving the immune system, alcohol intolerance results from the bodys metabolic limitations and typically occurs every time alcohol is consumed.

• #23 Alcohol intolerance – Wikipedia

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

  The increased accumulation of acetaldehyde in affected individuals due to deficient aldehyde dehydrogenase enzymes often leads to the characteristic symptom of having flushed skin. […] Alcohol intolerance results from metabolic challenges related to enzyme function, while alcohol allergy involves the immune response. […] Recognizing these differences can help individuals avoid triggers and seek appropriate medical advice.

• #24 Antihistamines prevent ‘Asian flush’ — alcohol-induced facial redness — but pose risks – USC Today

  https://today.usc.edu/antihistamines-prevent-asian-flush-the-red-face-some-people-get-from-alcohol-but-with-huge-risks/

  While using antihistamines such as Zantac to prevent alcohol-induced flushing is commonplace, USC experts say prolonged off-label use may have serious health consequences. […] Using histamine-2 blockers to reduce the Asian flush can escalate alcohol intake and increase the risk of stomach cancers, esophageal cancer and a type of skin cancer called squamous cell carcinoma, said Davies, a professor in the Titus Family Department of Clinical Pharmacy at the USC School of Pharmacy. […] The Asian flush is best known for creating a lobster-red face and neck when people drink alcohol, but the condition also results in a heightened heart rate, headache and nausea. […] However, for some Asians, Ashkenazi Jews and others whose gene pool contains a mutant or altered form of the ALDH2 gene, the toxic acetaldehyde isnt broken down as quickly, so it hangs around and accumulates in the liver and body resulting in what is known as the Asian glow.

• #25 Alcohol-associated bowel disease: new insights into pathogenesis | eGastroenterology

  https://egastroenterology.bmj.com/content/1/1/e100013

  Ethanol metabolism generates acetaldehyde and acetate, which could potentially promote functional disruptions of microbial and host components of the intestinal barrier along the gastrointestinal tract. […] The potential involvement of acetaldehyde and acetate in the pathogenesis of the underlying ABD, including cancer, is discussed. […] The characterisation of ABD has not been well defined, and underlying mechanisms of ABD pathogenesis remain poorly understood. […] Even if some elements implicated in the pathophysiology of ABD have been identified, we still do not know how the intestine effectively contributes to the metabolism of ethanol and its principal metabolites acetaldehyde and acetate and, also, in which manner products of ethanol metabolism impacts bowel functions. […] Acetaldehyde can disrupt tight junctions either directly or indirectly. […] Acetaldehyde and acetate have the potential to promote various dysfunctions of the intestine during acute and/or chronic alcohol consumption.

• #26 Antihistamines prevent ‘Asian flush’ — alcohol-induced facial redness — but pose risks – USC Today

  https://today.usc.edu/antihistamines-prevent-asian-flush-the-red-face-some-people-get-from-alcohol-but-with-huge-risks/

  While using antihistamines such as Zantac to prevent alcohol-induced flushing is commonplace, USC experts say prolonged off-label use may have serious health consequences. […] Using histamine-2 blockers to reduce the Asian flush can escalate alcohol intake and increase the risk of stomach cancers, esophageal cancer and a type of skin cancer called squamous cell carcinoma, said Davies, a professor in the Titus Family Department of Clinical Pharmacy at the USC School of Pharmacy. […] The Asian flush is best known for creating a lobster-red face and neck when people drink alcohol, but the condition also results in a heightened heart rate, headache and nausea. […] However, for some Asians, Ashkenazi Jews and others whose gene pool contains a mutant or altered form of the ALDH2 gene, the toxic acetaldehyde isnt broken down as quickly, so it hangs around and accumulates in the liver and body resulting in what is known as the Asian glow.

• #27 What causes for alcohol intolerance?

  https://www.healingwell.com/community/default.aspx?f=30&m=4207854&g=4207857

  Is there a specific mechanism or infection it causes such intense intolerance to alcohol. […] As I recall, the liver P450 pathway is already over taxed from the endo toxins and our treatment protocols. The same P450 liver detox pathway is needed to remove the alcohol. […] Alcohol increases the toxic load on your liver which may already be at its maximum from the other aspects of the illness. it also increases oxidative stress which damages cells, blood vessels, and especially mitochondrial membranes – needed for energy production. […] if you are noticing alcohol intolerance it is a sign that this process is evident in your case and steps to reduce the load on the liver are advisable. […] the liver is a tremendously complex organ. it makes something like a few thousand chemicals/enzymes to do its job – and is believed by many to be the core of all health. […] general detoxification nutrients may help – but if it’s already struggling with alcohol – doubt there is anything you can put in that will resolve that.

• #28 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  In the presence of alcohol, a defective version of the aldehyde dehydrogenase 2 gene in human cell cultures and mice leads to biochemical changes associated with Alzheimer’s disease. […] This mutation in aldehyde dehydrogenase 2, or ALDH2, is associated with facial redness following alcohol consumption. It causes the activity of the enzyme to be greatly reduced, resulting in the buildup of acetaldehyde, a toxic product of alcohol metabolism. […] „Our data suggest that alcohol and Alzheimer’s disease-prone genes may put humans at greater risk of Alzheimer’s onset and progression,” Mochly-Rosen said. […] Compared to normal cells, the ALDH2*2 cells had more free radicals and more 4-HNE, another toxic chemical that’s normally processed by ALDH2. […] „Once these aldehydes accumulate, the first organelles that they damage are the organelles that contain the enzyme that is supposed to get rid of them: the mitochondria.” This vicious cycle ultimately leads to reduced mitochondrial activity, increased free radical formation by the damaged mitochondria and, in the case of Alzheimer’s disease, to death of neurons.

• #29 A lesser known mechanism for alcohol tolerance – Trevor Klee

  https://trevorklee.com/a-lesser-known-mechanism-for-alcohol-tolerance/

  There has to be a cellular adaptation, presumably one that affects the brain. And this adaptation seems to be a modification of the big potassium (BK) channel, which in turn has direct effects on the parts of the brain that are affected by alcohol. […] Alcohol induces the opening of BK channels, or, to be more precise, makes openings longer and closures shorter. So, whatever conduction is going to happen is made more likely by alcohol. However, if the BK channel is modified with 4-subunits, the BK channel can be made more resistant to the effects of alcohol. […] Long-term alcohol use can therefore presumably modify the BK channels that are complexed with NMDA receptors, making it more difficult for alcohol to antagonize them even at high BAC levels.

• #30 How does alcohol affect blood pressure?

  https://www.medicalnewstoday.com/articles/alcohol-and-blood-pressure

  Consuming alcohol affects the renin-angiotensin-aldosterone system (RAAS). The RAAS is controlled by the kidneys, and its function is to regulate blood pressure through three hormones: renin, angiotensin, and aldosterone. […] Alcohol increases blood levels of the hormone renin, which causes the blood vessels to constrict. This means that they get smaller in diameter. Renin also decreases how much fluid the body eliminates as urine. This combination of higher fluid levels in the body and smaller blood vessels increases blood pressure. […] Alcohol also reduces how much vasopressin the body makes. Vasopressin is an antidiuretic hormone. It causes the body to hold onto water, which typically limits how much urine the kidneys make. The action of suppressing this hormone exacerbates the diuretic effect and leads to dehydration.

• #31 How does alcohol affect blood pressure?

  https://www.medicalnewstoday.com/articles/alcohol-and-blood-pressure

  Consuming alcohol affects the renin-angiotensin-aldosterone system (RAAS). The RAAS is controlled by the kidneys, and its function is to regulate blood pressure through three hormones: renin, angiotensin, and aldosterone. […] Alcohol increases blood levels of the hormone renin, which causes the blood vessels to constrict. This means that they get smaller in diameter. Renin also decreases how much fluid the body eliminates as urine. This combination of higher fluid levels in the body and smaller blood vessels increases blood pressure. […] Alcohol also reduces how much vasopressin the body makes. Vasopressin is an antidiuretic hormone. It causes the body to hold onto water, which typically limits how much urine the kidneys make. The action of suppressing this hormone exacerbates the diuretic effect and leads to dehydration.

• #32 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #33 Alcohol Intolerance: Symptoms, Causes, and Testing

  https://www.columbusrecoverycenter.com/alcohol-addiction/alcohol-intolerance/

  Additionally, certain medications may lead to alcohol intolerance. The antibiotic metronidazole (Flagyl) can cause alcohol intolerance while being used. Another medicine called disulfiram (Antabuse) is actually designed to cause alcohol intolerance to help people stop drinking. […] Finally, certain diseases can cause alcohol intolerance. The best-known condition to cause alcohol intolerance is Hodgkins lymphoma; however, other conditions may also cause it. Alcohol intolerance is still normally uncommon in people with these types of conditions. […] There are some anecdotal cases of people experiencing alcohol intolerance after having COVID-19. However, there is no evidence showing that COVID-19 actually causes alcohol intolerance. […] A sudden intolerance to alcohol is possible if you begin using a medication that causes alcohol intolerance or develop a disease that causes it. Most cases of suddenly developed alcohol intolerance occur due to starting a new medicine that causes it. Genetic alcohol intolerance will not begin suddenly and will always be present from birth.

• #34 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #35 Alcohol Intolerance: Symptoms, Causes, and Testing

  https://www.columbusrecoverycenter.com/alcohol-addiction/alcohol-intolerance/

  Additionally, certain medications may lead to alcohol intolerance. The antibiotic metronidazole (Flagyl) can cause alcohol intolerance while being used. Another medicine called disulfiram (Antabuse) is actually designed to cause alcohol intolerance to help people stop drinking. […] Finally, certain diseases can cause alcohol intolerance. The best-known condition to cause alcohol intolerance is Hodgkins lymphoma; however, other conditions may also cause it. Alcohol intolerance is still normally uncommon in people with these types of conditions. […] There are some anecdotal cases of people experiencing alcohol intolerance after having COVID-19. However, there is no evidence showing that COVID-19 actually causes alcohol intolerance. […] A sudden intolerance to alcohol is possible if you begin using a medication that causes alcohol intolerance or develop a disease that causes it. Most cases of suddenly developed alcohol intolerance occur due to starting a new medicine that causes it. Genetic alcohol intolerance will not begin suddenly and will always be present from birth.

• #36 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #37 Delayed Onset of Alcohol-Induced Flushing Following Chronic Topical Tacrolimus Application – JDDonline – Journal of Drugs in Dermatology

  https://jddonline.com/articles/delayed-onset-of-alcohol-induced-flushing-following-chronic-topical-tacrolimus-application-S1545961621P0801X

  Topical tacrolimus may interact with alcohol producing a cutaneous reaction that mimics alcohol allergy in patients with and without atopic comorbidities. […] The pathogenesis of this reaction is largely unknown. Proposed mechanisms theorize that aldehyde dehydrogenase inhibition localized to the topical tacrolimus application site may result in elevated acetaldehyde levels and subsequent vasodilation. […] Ingestion of ethanol may further increase neuropeptide release, potentiating capsaicins effects. […] Alcohol intolerance associated with topical tacrolimus appears to be self-limited following tacrolimus cessation.

• #38 Drinking alcohol during antidepressant treatment — a cause for concern? – The Pharmaceutical Journal

  https://pharmaceutical-journal.com/article/news/drinking-alcohol-during-antidepressant-treatment-a-cause-for-concern

  Pathological intoxication in a given individual refers to usual amounts of alcohol producing either a markedly exaggerated intoxication or qualitatively different intoxication, for example, with highly uncharacteristic disinhibition or violence […] We have described a syndrome of pathological intoxication, often with serious consequences, in patients prescribed an SSRI or related drug. […] It is striking that often only modest or usual amounts of alcohol are involved, and that memory is impaired in roughly half of such cases. […] SPCs and PILs need to be strengthened to warn prescribers and patients clearly about the possibility of pathological alcohol intoxication during treatment with SSRIs and related drugs.

• #39 Drinking alcohol during antidepressant treatment — a cause for concern? – The Pharmaceutical Journal

  https://pharmaceutical-journal.com/article/news/drinking-alcohol-during-antidepressant-treatment-a-cause-for-concern

  Pathological intoxication in a given individual refers to usual amounts of alcohol producing either a markedly exaggerated intoxication or qualitatively different intoxication, for example, with highly uncharacteristic disinhibition or violence […] We have described a syndrome of pathological intoxication, often with serious consequences, in patients prescribed an SSRI or related drug. […] It is striking that often only modest or usual amounts of alcohol are involved, and that memory is impaired in roughly half of such cases. […] SPCs and PILs need to be strengthened to warn prescribers and patients clearly about the possibility of pathological alcohol intoxication during treatment with SSRIs and related drugs.

• #40 Pain After Drinking Alcohol: Possible Causes

  https://www.verywellhealth.com/pain-after-drinking-alcohol-2252569

  Alcohol intolerance and allergy account for most of the unusual responses that happen after drinking alcoholic beverages. […] Alcohol intolerance can cause people to feel unpleasant symptoms after drinking alcohol, including skin flushing, nausea and vomiting, headache, and a rapid heartbeat. It’s caused by the lack of an enzyme that breaks down alcohol in the body, called alcohol dehydrogenase. […] Some believe that pain is related to expansion of the blood vessels within the lymph node triggered by exposure to alcohol in the bloodstream. […] Scientists don’t know the reason for alcohol-related pain in Hodgkin disease, but one theory is blood vessel dilation. […] Limited research suggests that alcohol-induced pain in those with Hodgkin lymphoma may be treated with an over-the-counter pain medication, such as ibuprofen.

• #41 Alcohol Allergy Vs. Alcohol Intolerance – Bedrock Recovery Center Recovery Center

  https://bedrockrecoverycenter.com/alcohol/intolerance/vs-allergies/

  Alcohol intolerance occurs when the body lacks enzymes to digest the toxins in alcohol. […] Alcohol intolerance in people with Hodgkins lymphoma is estimated by one study at 1.5%-5%. In Hodgkins disease, the pathogenesis of alcohol-induced pain is not known. […] Some people have a hard time digesting alcohol because of a lack of an enzyme called aldehyde dehydrogenase (ALDH2). […] If you dont produce enough ADH, acetaldehyde can build up in your body and cause symptoms like nausea or headaches. […] Alcohol intolerance increases with age. As people age, their body tends to have an increased body fat percentage, and fat impedes the bodys ability to absorb alcohol. […] Because ADH has a low affinity for ethanol, it is very slow at metabolizing the stuff and produces metabolites like acetaldehyde, which causes flushing symptoms.

• #42 Pain After Drinking Alcohol: Possible Causes

  https://www.verywellhealth.com/pain-after-drinking-alcohol-2252569

  Alcohol intolerance and allergy account for most of the unusual responses that happen after drinking alcoholic beverages. […] Alcohol intolerance can cause people to feel unpleasant symptoms after drinking alcohol, including skin flushing, nausea and vomiting, headache, and a rapid heartbeat. It’s caused by the lack of an enzyme that breaks down alcohol in the body, called alcohol dehydrogenase. […] Some believe that pain is related to expansion of the blood vessels within the lymph node triggered by exposure to alcohol in the bloodstream. […] Scientists don’t know the reason for alcohol-related pain in Hodgkin disease, but one theory is blood vessel dilation. […] Limited research suggests that alcohol-induced pain in those with Hodgkin lymphoma may be treated with an over-the-counter pain medication, such as ibuprofen.

• #43 Alcohol intolerance – MEpedia

  https://me-pedia.org/wiki/Alcohol_intolerance

  Alcohol intolerance may occur in ME/CFS. It usually develops after the onset of the illness, where the patient was previously able to tolerate alcohol. […] A 2019 study with Stanford ME/CFS Initiative reported that 66% of subjects meeting the 1994 Fukuda CFS criteria were less able to tolerate alcohol compared to their pre-illness state. […] Channelopathy has been proposed as a mechanism of the illness which would explain intolerance to alcohol and other drugs. […] Alcohol is a depressant of the central nervous system, which tends to be hyper-reactive in people with ME/CFS. […] Alcohol is toxic for the liver, and many people with ME/CFS have suboptimal liver function. […] Alcohol can interfere with the methylation cycle. […] Alcohol is a vasodilator – this will exacerbate vascular symptoms such as neurally mediated hypotension or POTS.

• #44 Alcohol intolerance – MEpedia

  https://me-pedia.org/wiki/Alcohol_intolerance

  Alcohol intolerance may occur in ME/CFS. It usually develops after the onset of the illness, where the patient was previously able to tolerate alcohol. […] A 2019 study with Stanford ME/CFS Initiative reported that 66% of subjects meeting the 1994 Fukuda CFS criteria were less able to tolerate alcohol compared to their pre-illness state. […] Channelopathy has been proposed as a mechanism of the illness which would explain intolerance to alcohol and other drugs. […] Alcohol is a depressant of the central nervous system, which tends to be hyper-reactive in people with ME/CFS. […] Alcohol is toxic for the liver, and many people with ME/CFS have suboptimal liver function. […] Alcohol can interfere with the methylation cycle. […] Alcohol is a vasodilator – this will exacerbate vascular symptoms such as neurally mediated hypotension or POTS.

• #45 Alcohol intolerance – MEpedia

  https://me-pedia.org/wiki/Alcohol_intolerance

  Alcohol intolerance may occur in ME/CFS. It usually develops after the onset of the illness, where the patient was previously able to tolerate alcohol. […] A 2019 study with Stanford ME/CFS Initiative reported that 66% of subjects meeting the 1994 Fukuda CFS criteria were less able to tolerate alcohol compared to their pre-illness state. […] Channelopathy has been proposed as a mechanism of the illness which would explain intolerance to alcohol and other drugs. […] Alcohol is a depressant of the central nervous system, which tends to be hyper-reactive in people with ME/CFS. […] Alcohol is toxic for the liver, and many people with ME/CFS have suboptimal liver function. […] Alcohol can interfere with the methylation cycle. […] Alcohol is a vasodilator – this will exacerbate vascular symptoms such as neurally mediated hypotension or POTS.

• #46 Alcohol intolerance – MEpedia

  https://me-pedia.org/wiki/Alcohol_intolerance

  Alcohol intolerance may occur in ME/CFS. It usually develops after the onset of the illness, where the patient was previously able to tolerate alcohol. […] A 2019 study with Stanford ME/CFS Initiative reported that 66% of subjects meeting the 1994 Fukuda CFS criteria were less able to tolerate alcohol compared to their pre-illness state. […] Channelopathy has been proposed as a mechanism of the illness which would explain intolerance to alcohol and other drugs. […] Alcohol is a depressant of the central nervous system, which tends to be hyper-reactive in people with ME/CFS. […] Alcohol is toxic for the liver, and many people with ME/CFS have suboptimal liver function. […] Alcohol can interfere with the methylation cycle. […] Alcohol is a vasodilator – this will exacerbate vascular symptoms such as neurally mediated hypotension or POTS.

• #47 Alcohol intolerance – MEpedia

  https://me-pedia.org/wiki/Alcohol_intolerance

  Alcohol intolerance may occur in ME/CFS. It usually develops after the onset of the illness, where the patient was previously able to tolerate alcohol. […] A 2019 study with Stanford ME/CFS Initiative reported that 66% of subjects meeting the 1994 Fukuda CFS criteria were less able to tolerate alcohol compared to their pre-illness state. […] Channelopathy has been proposed as a mechanism of the illness which would explain intolerance to alcohol and other drugs. […] Alcohol is a depressant of the central nervous system, which tends to be hyper-reactive in people with ME/CFS. […] Alcohol is toxic for the liver, and many people with ME/CFS have suboptimal liver function. […] Alcohol can interfere with the methylation cycle. […] Alcohol is a vasodilator – this will exacerbate vascular symptoms such as neurally mediated hypotension or POTS.

• #48 Alcohol intolerance – MEpedia

  https://me-pedia.org/wiki/Alcohol_intolerance

  Alcohol intolerance may occur in ME/CFS. It usually develops after the onset of the illness, where the patient was previously able to tolerate alcohol. […] A 2019 study with Stanford ME/CFS Initiative reported that 66% of subjects meeting the 1994 Fukuda CFS criteria were less able to tolerate alcohol compared to their pre-illness state. […] Channelopathy has been proposed as a mechanism of the illness which would explain intolerance to alcohol and other drugs. […] Alcohol is a depressant of the central nervous system, which tends to be hyper-reactive in people with ME/CFS. […] Alcohol is toxic for the liver, and many people with ME/CFS have suboptimal liver function. […] Alcohol can interfere with the methylation cycle. […] Alcohol is a vasodilator – this will exacerbate vascular symptoms such as neurally mediated hypotension or POTS.

• #49 Alcohol intolerance in CFS – gives us a clue as to the mechanisms of fatigue – DoctorMyhill

  https://drmyhill.co.uk/wiki/Alcohol_intolerance_in_CFS_-_gives_us_a_clue_as_to_the_mechanisms_of_fatigue

  Alcohol intolerance is extremely common, if not universal, in patients with CFS/ME. […] I suspect there are many possible mechanisms for alcohol intolerance and these are symptomatic of other problems that also result in fatigue. […] The incomplete metabolism of alcohol in CFS/ME sufferers is caused both by the fact that the CFS/ME sufferer will have poor mitochondrial status and so will not have the ready supply of the high demands of energy required for these metabolic tasks and also by the fact there may be nutritional deficiencies present in the CFS/ME sufferer that will further limit her livers ability to metabolise. […] Alcohol drinking itself induces micronutrient deficiencies. […] So alcohol intolerance, and the nature of it, and the symptoms experienced by the individual concerned help to give us clues as to the mechanisms that are causing symptoms in that individual. […] Recovery from CFS/ME is often accompanied by alcohol tolerance.

• #50 Alcohol Intolerance After COVID: What Experts Think Is HappeningCaret DownTwitterFacebookLinkBuzzFeed News HomeBuzzFeed

  https://www.buzzfeednews.com/article/katiecamero/alcohol-intolerance-long-covid

  Post-COVID alcohol intolerance has not been studied yet, so no one knows how common it actually is, but interviews with doctors, researchers, and people who are no longer able to drink alcohol suggest it’s yet another mysterious symptom that could be a side effect of the viral infection. […] Alcohol intolerance can happen even to those who aren’t experiencing long COVID, may disappear or become less severe with time, and can be triggered by specific types of alcohol but not others. […] Alcohol intolerance is actually a key diagnostic feature of ME/CFS. Studies have found that it shows up in anywhere between 65% to 80% of people with the illness. […] When it’s related to long COVID or another chronic condition, however, alcohol intolerance likely harms the body through a different chemical mechanism that doesn’t involve an inherited genetic mutation or allergy, Komaroff said.

• #51 Alcohol Intolerance After COVID: What Experts Think Is HappeningCaret DownTwitterFacebookLinkBuzzFeed News HomeBuzzFeed

  https://www.buzzfeednews.com/article/katiecamero/alcohol-intolerance-long-covid

  Post-COVID alcohol intolerance has not been studied yet, so no one knows how common it actually is, but interviews with doctors, researchers, and people who are no longer able to drink alcohol suggest it’s yet another mysterious symptom that could be a side effect of the viral infection. […] Alcohol intolerance can happen even to those who aren’t experiencing long COVID, may disappear or become less severe with time, and can be triggered by specific types of alcohol but not others. […] Alcohol intolerance is actually a key diagnostic feature of ME/CFS. Studies have found that it shows up in anywhere between 65% to 80% of people with the illness. […] When it’s related to long COVID or another chronic condition, however, alcohol intolerance likely harms the body through a different chemical mechanism that doesn’t involve an inherited genetic mutation or allergy, Komaroff said.

• #52 Alcohol Intolerance After COVID: What Experts Think Is HappeningCaret DownTwitterFacebookLinkBuzzFeed News HomeBuzzFeed

  https://www.buzzfeednews.com/article/katiecamero/alcohol-intolerance-long-covid

  It’s also possible the coronavirus may directly affect the enzymes responsible for processing alcohol, said Dr. Vikrant Rachakonda, a hepatologist, gastroenterologist, and professor of medicine at UC Davis Health. […] The liver processes everything we consume, including alcohol, so when the organ is injured or weakened in any way, it becomes vulnerable to further injury when exposed to toxins, like alcohol, Komaroff said. […] COVID can injure the liver in more ways than one, and some experts, like Malcolm, the long COVID doctor, suspects the disease causes “a little bit more injury to the liver than we thought that’s not apparent in standard lab tests.” […] It’s possible that people who cannot tolerate alcohol after COVID may have sustained an acute liver injury from their infection or have an undiagnosed liver condition.

• #53 Alcohol Intolerance After COVID: What Experts Think Is HappeningCaret DownTwitterFacebookLinkBuzzFeed News HomeBuzzFeed

  https://www.buzzfeednews.com/article/katiecamero/alcohol-intolerance-long-covid

  It’s also possible the coronavirus may directly affect the enzymes responsible for processing alcohol, said Dr. Vikrant Rachakonda, a hepatologist, gastroenterologist, and professor of medicine at UC Davis Health. […] The liver processes everything we consume, including alcohol, so when the organ is injured or weakened in any way, it becomes vulnerable to further injury when exposed to toxins, like alcohol, Komaroff said. […] COVID can injure the liver in more ways than one, and some experts, like Malcolm, the long COVID doctor, suspects the disease causes “a little bit more injury to the liver than we thought that’s not apparent in standard lab tests.” […] It’s possible that people who cannot tolerate alcohol after COVID may have sustained an acute liver injury from their infection or have an undiagnosed liver condition.

• #54 Alcohol Intolerance After COVID: What Experts Think Is HappeningCaret DownTwitterFacebookLinkBuzzFeed News HomeBuzzFeed

  https://www.buzzfeednews.com/article/katiecamero/alcohol-intolerance-long-covid

  Studies show that long COVID exacerbates this process by activating mast cells, encouraging them to release extra histamine into the body. […] Alcohol not only contains histamine — it’s a byproduct of the fermentation and brewing process — but it also pushes mast cells to release more of it and then blocks an enzyme called the DAO enzyme from breaking histamine down. […] Many long COVID patients (along with ME/CFS patients) experience issues with their autonomic nervous system, which plays a critical role in how blood vessels constrict and dilate, but researchers don’t yet fully understand why. […] Alcohol widens your blood vessels even more, further decreasing blood pressure.

• #55 Alcohol Intolerance After COVID: What Experts Think Is HappeningCaret DownTwitterFacebookLinkBuzzFeed News HomeBuzzFeed

  https://www.buzzfeednews.com/article/katiecamero/alcohol-intolerance-long-covid

  Studies show that long COVID exacerbates this process by activating mast cells, encouraging them to release extra histamine into the body. […] Alcohol not only contains histamine — it’s a byproduct of the fermentation and brewing process — but it also pushes mast cells to release more of it and then blocks an enzyme called the DAO enzyme from breaking histamine down. […] Many long COVID patients (along with ME/CFS patients) experience issues with their autonomic nervous system, which plays a critical role in how blood vessels constrict and dilate, but researchers don’t yet fully understand why. […] Alcohol widens your blood vessels even more, further decreasing blood pressure.

• #56

  https://medium.com/@calebwilemon/covid19-survivors-alcohol-intolerance-9d97e91edf47

  Several people who have recovered from the coronavirus have reported a new intolerance for alcohol. […] These people report increased hangover symptoms that seem to come on just minutes after having one drink. […] If you can handle all that, allow me to introduce you to what I affectionately call Post-Covid19 Alcohol Induced Histamine Intolerance! […] My labs show significant levels of histamines, which would explain the alcohol intolerance I developed after COVID. […] I have noticed that my hangovers seem to be worse, post-COVID. […] I can no longer drink more than two beers or it feels like I went out clubbing. […] Since having COVID, I have had a rash on my face that improves with Zyrtec. Alcohol exacerbates it and makes it swell. […] Knowing now that histamine intolerance produces symptoms that are similar to the novel alcohol intolerance experienced by some COVID survivors, that histamine is an inflammatory mediator released by mast cells during natural immune response, and that there is some evidence that COVID19 in particular can cause dysfunctional mast cell activation and release of histamine, we need only to look back at the role of alcohol to tie up this whole thing in a gorgeous bow of little academic value.

• #57

  https://medium.com/@calebwilemon/covid19-survivors-alcohol-intolerance-9d97e91edf47

  It may actually be that you are experiencing a histamine intolerance caused by leftover inflammatory responses to the virus. […] It may be that you are already teeming with histamines because COVID has caused a temporary dysfunction in mast cell activation for you and even one beer may be the straw that breaks the camel’s back, to use a medical expression.

• #58 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  In the presence of alcohol, a defective version of the aldehyde dehydrogenase 2 gene in human cell cultures and mice leads to biochemical changes associated with Alzheimer’s disease. […] This mutation in aldehyde dehydrogenase 2, or ALDH2, is associated with facial redness following alcohol consumption. It causes the activity of the enzyme to be greatly reduced, resulting in the buildup of acetaldehyde, a toxic product of alcohol metabolism. […] „Our data suggest that alcohol and Alzheimer’s disease-prone genes may put humans at greater risk of Alzheimer’s onset and progression,” Mochly-Rosen said. […] Compared to normal cells, the ALDH2*2 cells had more free radicals and more 4-HNE, another toxic chemical that’s normally processed by ALDH2. […] „Once these aldehydes accumulate, the first organelles that they damage are the organelles that contain the enzyme that is supposed to get rid of them: the mitochondria.” This vicious cycle ultimately leads to reduced mitochondrial activity, increased free radical formation by the damaged mitochondria and, in the case of Alzheimer’s disease, to death of neurons.

• #59 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  In the presence of alcohol, a defective version of the aldehyde dehydrogenase 2 gene in human cell cultures and mice leads to biochemical changes associated with Alzheimer’s disease. […] This mutation in aldehyde dehydrogenase 2, or ALDH2, is associated with facial redness following alcohol consumption. It causes the activity of the enzyme to be greatly reduced, resulting in the buildup of acetaldehyde, a toxic product of alcohol metabolism. […] „Our data suggest that alcohol and Alzheimer’s disease-prone genes may put humans at greater risk of Alzheimer’s onset and progression,” Mochly-Rosen said. […] Compared to normal cells, the ALDH2*2 cells had more free radicals and more 4-HNE, another toxic chemical that’s normally processed by ALDH2. […] „Once these aldehydes accumulate, the first organelles that they damage are the organelles that contain the enzyme that is supposed to get rid of them: the mitochondria.” This vicious cycle ultimately leads to reduced mitochondrial activity, increased free radical formation by the damaged mitochondria and, in the case of Alzheimer’s disease, to death of neurons.

• #60 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  In the presence of alcohol, a defective version of the aldehyde dehydrogenase 2 gene in human cell cultures and mice leads to biochemical changes associated with Alzheimer’s disease. […] This mutation in aldehyde dehydrogenase 2, or ALDH2, is associated with facial redness following alcohol consumption. It causes the activity of the enzyme to be greatly reduced, resulting in the buildup of acetaldehyde, a toxic product of alcohol metabolism. […] „Our data suggest that alcohol and Alzheimer’s disease-prone genes may put humans at greater risk of Alzheimer’s onset and progression,” Mochly-Rosen said. […] Compared to normal cells, the ALDH2*2 cells had more free radicals and more 4-HNE, another toxic chemical that’s normally processed by ALDH2. […] „Once these aldehydes accumulate, the first organelles that they damage are the organelles that contain the enzyme that is supposed to get rid of them: the mitochondria.” This vicious cycle ultimately leads to reduced mitochondrial activity, increased free radical formation by the damaged mitochondria and, in the case of Alzheimer’s disease, to death of neurons.

• #61 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  Adding alcohol to cells with either ALDH2 or ALDH2*2 derived from patients with Alzheimer’s disease led to an increase in free radicals; the effect was greater, though, in the ALDH2*2 cells. […] The mutant mice also accumulated beta-amyloid protein fragments and activated tau protein more than normal mice. Both of these changes are molecular signatures for Alzheimer’s disease. […] Neuroinflammation, or inflammation of the nervous system, is normally caused by injury, infection and even the aging process, but recent studies have found that chronic neuroinflammation worsens the progression of neurodegenerative diseases, such as Alzheimer’s disease. […] The findings in the study point to a previously undiscovered role of alcohol and ALDH2 in Alzheimer’s disease. […] Such studies could help determine whether decreased alcohol consumption and treatment with compounds, such as Alda-1, might reduce the progression and burden of Alzheimer’s disease in the world’s aging population. […] Alda-1-like compounds may prove to aid in treatment to reduce the risk of Alzheimer’s disease in humans.

• #62 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  Adding alcohol to cells with either ALDH2 or ALDH2*2 derived from patients with Alzheimer’s disease led to an increase in free radicals; the effect was greater, though, in the ALDH2*2 cells. […] The mutant mice also accumulated beta-amyloid protein fragments and activated tau protein more than normal mice. Both of these changes are molecular signatures for Alzheimer’s disease. […] Neuroinflammation, or inflammation of the nervous system, is normally caused by injury, infection and even the aging process, but recent studies have found that chronic neuroinflammation worsens the progression of neurodegenerative diseases, such as Alzheimer’s disease. […] The findings in the study point to a previously undiscovered role of alcohol and ALDH2 in Alzheimer’s disease. […] Such studies could help determine whether decreased alcohol consumption and treatment with compounds, such as Alda-1, might reduce the progression and burden of Alzheimer’s disease in the world’s aging population. […] Alda-1-like compounds may prove to aid in treatment to reduce the risk of Alzheimer’s disease in humans.

• #63 The Role of Diet Variation on Alcohol Tolerance Assay and on the Gut Microbiome Interaction – Pilot Project – Instituto de Investigaciones Interdisciplinarias Cayey

  https://www.upr.edu/iii-cayey/project/the-role-of-diet-variation-on-alcohol-tolerance-assay-and-on-the-gut-microbiome-interaction/

  Drug of abuse such as alcohol produces long lasting changes in the brain reward circuitry. […] Several internal and external factors such as stress, genetics, psychological, obesity, microbiome, and environment have been shown to influence alcohol consumption. […] Our long-term goal is to identify possible mechanism by which the diet modification alters both the alcohol tolerance, and the microbiota composition and how this interaction could be leading to alcohol abuse. […] Recent findings suggest that the gut microbiome can influence alcohol abuse and the diet influence both. […] Our specific aim is to Investigate the role of diet variation on the alcohol tolerance assay and on the gut microbiome composition. […] To assess the role of the microbiome in the development of alcohol tolerance we plan to generate axenic like flies by adding an antibiotic cocktail to all diet treatments and the alcohol tolerance assay will be performed. […] By doing so, this study can help identify new causes and targets for AUD treatments.

• #64 The Role of Diet Variation on Alcohol Tolerance Assay and on the Gut Microbiome Interaction – Pilot Project – Instituto de Investigaciones Interdisciplinarias Cayey

  https://www.upr.edu/iii-cayey/project/the-role-of-diet-variation-on-alcohol-tolerance-assay-and-on-the-gut-microbiome-interaction/

  Drug of abuse such as alcohol produces long lasting changes in the brain reward circuitry. […] Several internal and external factors such as stress, genetics, psychological, obesity, microbiome, and environment have been shown to influence alcohol consumption. […] Our long-term goal is to identify possible mechanism by which the diet modification alters both the alcohol tolerance, and the microbiota composition and how this interaction could be leading to alcohol abuse. […] Recent findings suggest that the gut microbiome can influence alcohol abuse and the diet influence both. […] Our specific aim is to Investigate the role of diet variation on the alcohol tolerance assay and on the gut microbiome composition. […] To assess the role of the microbiome in the development of alcohol tolerance we plan to generate axenic like flies by adding an antibiotic cocktail to all diet treatments and the alcohol tolerance assay will be performed. […] By doing so, this study can help identify new causes and targets for AUD treatments.

• #65 The Role of Diet Variation on Alcohol Tolerance Assay and on the Gut Microbiome Interaction – Pilot Project – Instituto de Investigaciones Interdisciplinarias Cayey

  https://www.upr.edu/iii-cayey/project/the-role-of-diet-variation-on-alcohol-tolerance-assay-and-on-the-gut-microbiome-interaction/

  Drug of abuse such as alcohol produces long lasting changes in the brain reward circuitry. […] Several internal and external factors such as stress, genetics, psychological, obesity, microbiome, and environment have been shown to influence alcohol consumption. […] Our long-term goal is to identify possible mechanism by which the diet modification alters both the alcohol tolerance, and the microbiota composition and how this interaction could be leading to alcohol abuse. […] Recent findings suggest that the gut microbiome can influence alcohol abuse and the diet influence both. […] Our specific aim is to Investigate the role of diet variation on the alcohol tolerance assay and on the gut microbiome composition. […] To assess the role of the microbiome in the development of alcohol tolerance we plan to generate axenic like flies by adding an antibiotic cocktail to all diet treatments and the alcohol tolerance assay will be performed. […] By doing so, this study can help identify new causes and targets for AUD treatments.

• #66 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #67 Alcohol Intolerance: Symptoms, Tests & Alcohol Allergy

  https://my.clevelandclinic.org/health/diseases/17659-alcohol-intolerance

  Alcohol intolerance is an inherited metabolic disorder. Metabolic disorders affect your metabolism, the way your body converts and uses energy. An inherited metabolic disorder means you got this condition from your parents they each passed down a mutated (changed) gene that resulted in this disorder. Alcohol intolerance is a problem with the specific enzyme that helps your body metabolize alcohol. Even drinking a small amount of alcohol (ethanol) causes unpleasant symptoms. In people with alcohol intolerance, a genetic mutation (change) makes ALDH2 less active or inactive. As a result, your body cant convert acetaldehyde to acetic acid. Acetaldehyde starts to build up in your blood and tissues, causing symptoms.

• #68 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #69 Antihistamines prevent ‘Asian flush’ — alcohol-induced facial redness — but pose risks – USC Today

  https://today.usc.edu/antihistamines-prevent-asian-flush-the-red-face-some-people-get-from-alcohol-but-with-huge-risks/

  While using antihistamines such as Zantac to prevent alcohol-induced flushing is commonplace, USC experts say prolonged off-label use may have serious health consequences. […] Using histamine-2 blockers to reduce the Asian flush can escalate alcohol intake and increase the risk of stomach cancers, esophageal cancer and a type of skin cancer called squamous cell carcinoma, said Davies, a professor in the Titus Family Department of Clinical Pharmacy at the USC School of Pharmacy. […] The Asian flush is best known for creating a lobster-red face and neck when people drink alcohol, but the condition also results in a heightened heart rate, headache and nausea. […] However, for some Asians, Ashkenazi Jews and others whose gene pool contains a mutant or altered form of the ALDH2 gene, the toxic acetaldehyde isnt broken down as quickly, so it hangs around and accumulates in the liver and body resulting in what is known as the Asian glow.

• #70 Alcohol intolerance – Wikipedia

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

  Alcohol intolerance is due to a genetic polymorphism of the aldehyde dehydrogenase enzyme, which is responsible for the metabolism of acetaldehyde (produced from the metabolism of alcohol by alcohol dehydrogenase). […] This polymorphism is most often reported in patients of East Asian descent. […] Alcohol intolerance may also be an associated side effect of certain drugs such as disulfiram, metronidazole, or nilutamide. […] It may also be characterized as intolerance causing hangover symptoms similar to the „disulfiram-like reaction” of aldehyde dehydrogenase deficiency or chronic fatigue syndrome. […] Severe pain after drinking alcohol may indicate a more serious underlying condition. […] ALDH1 is an isozyme of aldehyde dehydrogenase. A structural mutation in the gene of ALDH1, commonly found in East Asians, results in low levels of functional ALDH1 enzyme and thus, higher blood acetaldehyde levels.

• #71 Alcohol Intolerance: Symptoms, Causes, and Testing

  https://www.columbusrecoverycenter.com/alcohol-addiction/alcohol-intolerance/

  Additionally, certain medications may lead to alcohol intolerance. The antibiotic metronidazole (Flagyl) can cause alcohol intolerance while being used. Another medicine called disulfiram (Antabuse) is actually designed to cause alcohol intolerance to help people stop drinking. […] Finally, certain diseases can cause alcohol intolerance. The best-known condition to cause alcohol intolerance is Hodgkins lymphoma; however, other conditions may also cause it. Alcohol intolerance is still normally uncommon in people with these types of conditions. […] There are some anecdotal cases of people experiencing alcohol intolerance after having COVID-19. However, there is no evidence showing that COVID-19 actually causes alcohol intolerance. […] A sudden intolerance to alcohol is possible if you begin using a medication that causes alcohol intolerance or develop a disease that causes it. Most cases of suddenly developed alcohol intolerance occur due to starting a new medicine that causes it. Genetic alcohol intolerance will not begin suddenly and will always be present from birth.

• #72 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  In the presence of alcohol, a defective version of the aldehyde dehydrogenase 2 gene in human cell cultures and mice leads to biochemical changes associated with Alzheimer’s disease. […] This mutation in aldehyde dehydrogenase 2, or ALDH2, is associated with facial redness following alcohol consumption. It causes the activity of the enzyme to be greatly reduced, resulting in the buildup of acetaldehyde, a toxic product of alcohol metabolism. […] „Our data suggest that alcohol and Alzheimer’s disease-prone genes may put humans at greater risk of Alzheimer’s onset and progression,” Mochly-Rosen said. […] Compared to normal cells, the ALDH2*2 cells had more free radicals and more 4-HNE, another toxic chemical that’s normally processed by ALDH2. […] „Once these aldehydes accumulate, the first organelles that they damage are the organelles that contain the enzyme that is supposed to get rid of them: the mitochondria.” This vicious cycle ultimately leads to reduced mitochondrial activity, increased free radical formation by the damaged mitochondria and, in the case of Alzheimer’s disease, to death of neurons.

• #73 Alcohol Intolerance After COVID: What Experts Think Is HappeningCaret DownTwitterFacebookLinkBuzzFeed News HomeBuzzFeed

  https://www.buzzfeednews.com/article/katiecamero/alcohol-intolerance-long-covid

  Post-COVID alcohol intolerance has not been studied yet, so no one knows how common it actually is, but interviews with doctors, researchers, and people who are no longer able to drink alcohol suggest it’s yet another mysterious symptom that could be a side effect of the viral infection. […] Alcohol intolerance can happen even to those who aren’t experiencing long COVID, may disappear or become less severe with time, and can be triggered by specific types of alcohol but not others. […] Alcohol intolerance is actually a key diagnostic feature of ME/CFS. Studies have found that it shows up in anywhere between 65% to 80% of people with the illness. […] When it’s related to long COVID or another chronic condition, however, alcohol intolerance likely harms the body through a different chemical mechanism that doesn’t involve an inherited genetic mutation or allergy, Komaroff said.

• #74

  https://www.omim.org/entry/610251

  Xiao et al. (1996) referred to the ALDH2 enzyme encoded by the ALDH2*1 allele (the wildtype form) as ALDH2E and the enzyme subunit encoded by ALDH2*2 as ALDH2K. They found that the ALDH2E enzyme was very stable, with a half-life of at least 22 hours. ALDH2K, on the other hand, had an enzyme half-life of only 14 hours. In cells expressing both subunits, most of the subunits assemble as heterotetramers, and these enzymes had a half-life of 13 hours. Thus, the effect of ALDH2K on enzyme turnover is dominant. Their studies indicated that ALDH2*2 exerts its dominant effect both by interfering with the catalytic activity of the enzyme and by increasing its turnover. […] Because genetic epidemiologic studies have suggested a mechanism by which homozygosity for the ALDH2*2 allele inhibits the development of alcoholism in Asians, Peng et al. (1999) recruited 18 adult Han Chinese men, matched by age, body-mass index, nutritional state, and homozygosity at the ALDH2 gene loci from a population of 273 men. Six individuals were chosen for each of the 3 ALDH2 allotypes, i.e., 2 homozygotes and 1 heterozygote. Following a low dose of ethanol, homozygous ALDH2*2 individuals were found to be strikingly responsive with pronounced cardiovascular hemodynamic effects as well as subjective perception of general discomfort for as long as 2 hours following ingestion.

• #75 Alcohol, 'Asian glow’ mutation may contribute to Alzheimer’s disease, study finds | News Center

  https://med.stanford.edu/news/all-news/2019/12/alcohol-asian-glow-mutation-may-contribute-to-alzheimers.html

  Adding alcohol to cells with either ALDH2 or ALDH2*2 derived from patients with Alzheimer’s disease led to an increase in free radicals; the effect was greater, though, in the ALDH2*2 cells. […] The mutant mice also accumulated beta-amyloid protein fragments and activated tau protein more than normal mice. Both of these changes are molecular signatures for Alzheimer’s disease. […] Neuroinflammation, or inflammation of the nervous system, is normally caused by injury, infection and even the aging process, but recent studies have found that chronic neuroinflammation worsens the progression of neurodegenerative diseases, such as Alzheimer’s disease. […] The findings in the study point to a previously undiscovered role of alcohol and ALDH2 in Alzheimer’s disease. […] Such studies could help determine whether decreased alcohol consumption and treatment with compounds, such as Alda-1, might reduce the progression and burden of Alzheimer’s disease in the world’s aging population. […] Alda-1-like compounds may prove to aid in treatment to reduce the risk of Alzheimer’s disease in humans.

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