Histamine intolerance in women: How common is it really?

About 1 to 3% of the population are thought to be affected, but this figure is an estimate rather than a measured prevalence. The 2020 review by Comas-Basté and colleagues explicitly states that some authors have estimated this share. A DocCheck article on the topic notes that this range has been cited unchanged for many years.

→ Sources: Comas-Basté et al. (2020) · DocCheck overview

The Swiss Allergy Centre reports a figure of about 1% of the population for Switzerland. Data for Germany and Austria based on a validated diagnostic procedure are missing. This is the fundamental problem: where there is no reliable test, prevalence cannot be precisely determined.

→ Source: aha! Swiss Allergy Centre

And women? The data is less clear than many advice columns suggest. According to Comas-Basté et al., one study of 28 people found no difference between men and women. Another described similar proportions in women (83%) and men (90%) among migraine patients with DAO deficiency. A third reported a higher frequency in women.

→ Source: Comas-Basté et al., section on gender differences

Hrubisko and colleagues summarized it in 2021 as follows: women are generally more affected by intolerances than men. This applies to intolerances in general, not as a proven percentage specifically for histamine. The AWMF guideline describes a peculiarity for women: increased symptoms are observed premenstrually.

→ Sources: Hrubisko et al. (2021) · AWMF guideline

What is histamine intolerance? Bucket, enzyme, and pseudoallergy

Histamine intolerance is not an allergy, but an imbalance: more histamine enters the body or is produced than can be broken down. The Swiss Allergy Centre describes it as affected individuals being unable to sufficiently break down histamine from food and the body's own histamine. Two enzymes are primarily responsible: diamine oxidase (DAO) in the gut and histamine N-methyltransferase (HNMT).

→ Source: aha! Swiss Allergy Centre – Histamine intolerance

Many experts use the analogy of a bucket. It fills up due to histamine-rich meals, alcohol, stress, or hormonal fluctuations, and the enzymes empty it. If it overflows, symptoms occur. This image is a simplification, but it helps to understand why the same meal can be problem-free one day and cause issues the next.

The AGES in Austria points out that fermented foods such as dry-cured sausage, anchovies, aged cheese, and sauerkraut can contain particularly high levels of biogenic amines. The authority only classifies poisoning as occurring at levels above approximately 1,000 mg of histamine per meal, for example from tuna, hard cheese, or red wine. In the EU, legal limits only exist for certain marine fish. For people with intolerance, the individual threshold is significantly lower, but cannot be measured in a standardized way.

→ Source: AGES (Austria) – Biogenic amines

Medications also play a role. Comas-Basté et al. list several active ingredients in a table that can inhibit DAO. Chloroquine and clavulanic acid are noted as causing inhibition of more than 90%. Anyone taking regular medication and noticing symptoms after meals should discuss this with their doctor instead of stopping preparations on their own.

→ Source: Comas-Basté O et al. – Histamine Intolerance: The Current State of the Art, Biomolecules (2020)

Symptoms of histamine intolerance in women: What is typical and what is not

The symptoms are varied and non-specific, which is precisely what makes identification difficult. The Swiss Allergy Centre lists sudden skin redness (flushing), itching, nausea, vomiting, diarrhea, abdominal pain, drop in blood pressure, dizziness, heart palpitations, and headaches. According to the same source, cycle-related symptoms are added in women.

→ Source: aha! Swiss Allergy Centre – Histamine intolerance

Women may recognize many of these from other causes. A sudden flush with heart palpitations is frequently associated with menopause; more on this in the article Hot flashes during menopause. Bloating and a feeling of fullness during the cycle is a topic in itself, which we cover in the article Bloating in women and hormones. Headaches around the period often have a hormonal background; see Hormonal migraine in women.

This overlap is the reason why self-diagnoses are unreliable. One symptom alone proves nothing. Patterns are what make information meaningful: do symptoms regularly occur after certain meals, and do they improve when these triggers are removed? The following table classifies which symptom might point to what and what else should be considered during clarification.

→ Sources: Symptom list: aha! Swiss Allergy Centre · Cycle observation: AWMF guideline

Cycle and hormones: What research actually shows about histamine intolerance in women

There is evidence of a connection between the cycle and histamine breakdown, but no simple rule like "estrogen high, intolerance worse." The data consist of small studies on DAO levels in the blood, observations, and anecdotal reports. Nevertheless, a review paper compiles a whole series of findings, which we will classify individually here.

Hrubisko et al. (2021) report that DAO activity in serum in premenopausal women is linked to the menstrual cycle: higher activity was measured in the luteal phase, i.e., the second half of the cycle, than in the follicular phase. Comas-Basté et al. (2020) write that significant fluctuations in DAO levels have been described in women during different cycle phases. However, the authors explain neither the estrogen mechanisms nor do they provide specific measured values.

→ Sources: Hrubisko et al. (2021) · Comas-Basté et al. (2020)

Two further findings from the same overview: According to the authors, high histamine degradation products in the urine during the ovulatory phase could be related to the effect of estrogens, especially estradiol. And: Increased sensitivity to ingested histamine was observed in women in the premenstrual phase. Painful menstruation could be related to increased histamine sensitivity, and H1-antihistamines on the first day of the period have been shown to have a preventative effect on dysmenorrhea. These are observations, not treatment recommendations.

→ Source: Hrubisko M et al. – Histamine Intolerance: The More We Know the Less We Know, Nutrients (2021)

Evidence overview: Cycle and histamine

→ Sources: Hrubisko et al. (2021) · Comas-Basté et al. (2020) · AWMF guideline

What does this mean in practice? Anyone who suspects a connection between symptoms and the cycle can best check this themselves. A cycle calendar kept alongside a food diary will show over two to three cycles whether the symptoms are truly recurring. You can find general background information on cycle disorders and nutrients in our articles Menstrual Cycle Problems and PMS and Cycle Discomfort.

Pregnancy: Why DAO activity can rise sharply

During pregnancy, histamine-related symptoms improve significantly for many women because DAO activity in the blood rises sharply. A prospective observational study by Duelo and colleagues (2025) followed 30 pregnant women diagnosed with histamine intolerance. Symptoms improved in 27 out of 30 cases. Serum DAO activity rose from 7.69 ± 5.2 U/ml before pregnancy to 80.18 ± 26.8 U/ml during pregnancy.

→ Source: Duelo et al., J Clin Med (2025)

After birth, DAO activity decreased again two months later, and individual symptoms partially returned. The authors themselves state the limitations: small sample size, no validated scales for symptom severity, and no recording of diet during the study. There was no control group. The data therefore show an association, not a proven mechanism of action.

→ Source: Duelo A et al. – Improvement of Histamine Intolerance Symptoms in Pregnant Women with Diamine Oxidase Deficiency, J Clin Med (2025)

Important for readers: Those who are pregnant or breastfeeding should not start a diet change on their own. Especially during this time, sufficient nutrient intake is crucial. Background information on this can be found in our article Nutrients During Breastfeeding.

Perimenopause and menopause: What is proven and what remains expert opinion

Whether histamine intolerance worsens during perimenopause is not proven by controlled studies. In the sources we reviewed, there are no studies that specifically examine women in menopause. What does exist are anecdotal reports and assessments by individual doctors.

In an episode of The Dr. Hyman Show, Dr. Mark Hyman and Dr. Elizabeth Boham express the view that high estrogen levels impair histamine degradation and that women in perimenopause often experience a worsening of symptoms. In their case study, they used sulforaphane and calcium-D-glucarate to support estrogen metabolism. This is a practice report from functional medicine, not proof of efficacy.

→ Source: The Dr. Hyman Show, episode with Dr. Elizabeth Boham

What the review articles actually support is more limited: DAO fluctuations during the cycle and observations regarding histamine sensitivity before the period. It cannot be deduced from this that the drop in estrogen during menopause causes histamine problems. Both statements are plausible but have not yet been tested in a suitable study.

Hot flashes, sleep disorders, and palpitations can occur during menopause and resemble histamine symptoms. Therefore, a clean separation is worthwhile: symptoms that reliably occur after certain foods point more towards an intolerance. Symptoms without a link to meals point more towards hormonal causes. We have examined how effective nutrients are during menopause in Dietary Supplements in Menopause.

Histamine intolerance test: Why there is no reliable diagnosis

There is no recognized test that reliably confirms histamine intolerance. The AWMF guideline phrases it as follows: A validated procedure for the diagnosis of intolerance to orally ingested histamine has not been described. Determining DAO activity in serum has no diagnostic value. The Swiss Allergy Centre classifies blood and urine tests for DAO and histamine as scientifically inconclusive and advises against them.

→ Sources: AWMF S1 guideline 061-030 on intolerance to orally ingested histamine (Reese, Worm et al.) · aha! Swiss Allergy Centre – Histamine intolerance

A central problem is highlighted by the study by Komericki et al. (2011). In 39 people suspected of having histamine intolerance, the researchers tested the oral administration of 75 mg of liquid histamine, first open-label, then blinded and in comparison with a placebo. Individual symptoms could not be reproduced in many patients. The authors conclude that an overall assessment of symptoms might be more meaningful than individual symptoms.

→ Source: Komericki P et al. – Histamine intolerance: lack of reproducibility of single symptoms by oral provocation with histamine, Wien Klin Wochenschr (2011)

The placebo effect is also significant. The DocCheck article "Much suspicion, little proof" cites a placebo-controlled study in which only 6.8% of the supposedly affected individuals showed objective symptoms after histamine administration, and 62.7% reported intolerance symptoms after unknowingly taking a placebo. We present these figures as a quote from the DocCheck text, as we have not checked the original study ourselves.

→ Source: DocCheck – Histamine intolerance: much suspicion, little proof

However, there is a counter-position. Schnedl and Enko (2021) consider histamine intolerance to be a disorder that primarily arises in the gut and write that a low serum DAO value can support the diagnosis. At the same time, they admit that serum values are not demonstrably consistent with activity in the gut. The main support for the diagnosis is a thorough medical history with a standardized questionnaire. The guideline reaches a stricter verdict on the blood test.

→ Source: Schnedl WJ, Enko D – Histamine Intolerance Originates in the Gut, Nutrients (2021)

Histamine intolerance nutrition: The three-phase plan according to the AWMF guideline

The guideline does not recommend a permanent diet, but a plan in three steps. Phase 1 is an elimination diet over 10 to 14 days. Phase 2 is the reintroduction phase up to 6 weeks, during which individual foods are tested. Phase 3 is an individually adapted long-term diet that only avoids what has proven to be a trigger.

→ Source: AWMF S1 guideline 061-030 on intolerance to orally ingested histamine (Reese, Worm et al.)

→ Source: AWMF guideline, three phases

Comas-Basté et al. cite a period of 4 to 8 weeks for a diagnostically used low-histamine diet until improvement or remission occurs. The Swiss Allergy Centre goes a step further: a strict low-histamine diet is not necessary; instead, individual tolerance should be tested by gradually increasing intake. The Consumer Advice Centre (Verbraucherzentrale) adds that a balanced diet is generally possible even with histamine and fructose intolerance and that a nutrition professional can help.

→ Sources: Comas-Basté et al. (2020) · aha! Swiss Allergy Centre · Consumer Advice Centre

How well-evidenced is this? Jackson and colleagues (2025) note that according to available reports, a low-histamine diet can reduce symptoms in the gastrointestinal tract, skin, and nervous system. However, the state of research is limited, with a lack of consensus on threshold values and placebo-controlled studies, among other things. A large study protocol from Barcelona (Bartra et al., 2025) aims to change this. 400 patients are planned, with a duration of three months and eight intervention groups. We do not currently have results.

→ Sources: Jackson et al. (2025) · Bartra et al. (study protocol 2025)

A note on practice: during the elimination phase, foods that usually contribute to nutrient intake are often omitted. These include fermented products, fish, and aged cheese. A long-term diet without necessity is therefore a risk in itself. You can find more about the gut side of things in our article Gut health and probiotics.

DAO capsules for histamine intolerance: What studies, guidelines, and courts say

DAO capsules are not recommended by the guideline, and their benefit is not sufficiently established. The AWMF guideline states that the effectiveness of diamine oxidase supplementation has not yet been scientifically proven and is not recommended. The Consumer Advice Centre notes that it is not scientifically proven that a deficiency of endogenous DAO actually causes the symptoms.

→ Sources: AWMF-S1 guideline 061-030 on intolerance to orally ingested histamine (Reese, Worm et al.) · Consumer Advice Centre – Dietary supplements for histamine intolerance

Besides this, there are indications in the other direction. In the study by Komericki et al. (2011), DAO led to a statistically significant improvement in overall symptoms compared to placebo (p = 0.014). Jackson et al. (2025) report that all studies they evaluated found a reduction in symptoms with DAO administration. However, they point out that the effect could depend on cofactors such as vitamin C and the origin of the enzyme, and conclude with "limited clinical evidence." Hrubisko et al. (2021) write that studies on DAO supplementation are rare.

→ Sources: Komericki et al. (2011) · Jackson et al. (2025) · Hrubisko et al. (2021)

The Swiss Allergy Centre formulates it pragmatically: if necessary, DAO can be taken before meals. This contrasts with the guideline, which advises against it. How open-minded one is towards the topic thus depends on the weight one gives to small studies versus the lack of large, independent studies.

→ Source: aha! Swiss Allergy Centre – Histamine intolerance

The topic is also legally sensitive. The Frankfurt Regional Court prohibited the manufacturer Stada from claiming in advertising that DAOSiN tablets support the breakdown of histamine from food in the gut (Ref. 3-12 O 28/22). The Consumer Advice Centre NRW reported on this in January 2023. According to the Consumer Advice Centre, the judgment has been legally binding since March 14, 2024. This does not mean that the product is ineffective, but rather that the specific health-related claim is not permissible.

→ Sources: Press release Consumer Advice Centre NRW · Consumer Advice Centre, as of August 2025

Vitamin C, B6, copper, and magnesium for histamine intolerance: Is there anything to it?

Micronutrients as therapy are not proven, but they are discussed. Hrubisko et al. (2021) write that supplementation with vitamin C, copper, or vitamin B6 could be considered as a possible additional measure. This is a cautious formulation without proof of effectiveness from studies on women with histamine intolerance.

→ Source: Hrubisko M et al. – Histamine Intolerance: The More We Know the Less We Know, Nutrients (2021)

The background: Vitamin C, copper, and B6 play a role in enzymes of histamine metabolism. It does not follow that more of these will alleviate symptoms. Those who eat well usually cover their needs through food. We have a separate article on the dosage of vitamin C: Vitamin C dosage.

And magnesium? The search query "histamine intolerance does magnesium help" appears in Google autocomplete. In the studies and guidelines we reviewed, magnesium is not a proven measure against histamine intolerance. Dr. Hyman and Dr. Boham mention it in their discussion along with quercetin, luteolin, vitamin B6, vitamin C, and certain probiotics as a supportive possibility; this, in turn, is expert opinion. What magnesium does for sleep, muscles, and stress in a proven manner is in the article Magnesium benefits.

→ Source: The Dr. Hyman Show

Gut, stress, and medication: What can additionally fill the "bucket"

For many affected individuals, the cause lies not only in food but in the interaction with the gut, stress, and medication. Schnedl and Enko (2021) view histamine intolerance primarily as a gastrointestinal disease. They report that 55% of patients with carbohydrate intolerance or malabsorption had serum DAO levels below 10 U/ml. This shows overlaps but not a cause-and-effect relationship.

→ Source: Schnedl WJ, Enko D – Histamine Intolerance Originates in the Gut, Nutrients (2021)

Dr. Hyman and Dr. Boham name stress as an important trigger, as well as medications such as NSAIDs, antibiotics, and antidepressants, mold exposure, and a compromised gut barrier. They emphasize that histamine intolerance does not necessarily have to last a lifetime and that restrictions should be time-limited while addressing underlying causes. This is also expert opinion that fits with the cautious approach of the guideline (limited-term elimination, then reintroduction).

→ Source: The Dr. Hyman Show – What is Histamine Intolerance? (with Dr. Elizabeth Boham)

Stress influences digestion and hormones alike. How cortisol, sleep, and abdominal complaints can be related is in Cortisol belly in women. Stress is thus not a proven cause of histamine symptoms, but a plausible intensifier.

Evidence Map: What plays which role in histamine intolerance

→ Sources: AWMF-S1 Guideline 061-030 on intolerance to orally ingested histamine (Reese, Worm et al.) · aha! Swiss Allergy Centre – Histamine intolerance · Jackson K et al. – Evidence for Dietary Management of Histamine Intolerance, Int J Mol Sci (2025) · Komericki P et al. – Histamine intolerance: lack of reproducibility of single symptoms by oral provocation with histamine, Wien Klin Wochenschr (2011) · Hrubisko M et al. – Histamine Intolerance: The More We Know the Less We Know, Nutrients (2021) · Consumer Protection Centre (Verbraucherzentrale) – Supplements for histamine intolerance

The VEYT Histamine Check: 5 steps in the right order

The order is important. Cutting out foods before seeing a doctor can skew potential diagnostic results and leads to unnecessary restrictions. The plan follows the recommendations of the guideline and the Swiss specialist centre.

Myths and facts about histamine intolerance in women

"Estrogen causes histamine intolerance"

A connection between hormones and histamine degradation is plausible and has been partially described. However, proven cause-and-effect evidence in humans is lacking. Claims such as "high estrogen blocks degradation" are currently just expert opinion.

"A low DAO level proves the diagnosis"

The AWMF guideline attributes no diagnostic significance to serum DAO. Even proponents such as Schnedl and Enko admit that serum levels do not reliably reflect intestinal activity.

"If you have histamine intolerance, you must avoid it strictly for life"

The guideline suggests a gradual reintroduction after the elimination phase. The Swiss Allergy Centre does not consider a strict low-histamine diet to be necessary.

"DAO capsules are clinically proven"

There are small positive studies, but the guideline does not recommend them and the Consumer Protection Centre states that the benefits are unproven. The specific advertising claim "supports histamine degradation" was prohibited by a court for one product.

"Any discomfort after wine or cheese is histamine"

According to a comparison cited by DocCheck, symptoms occurred frequently even after unknowingly taking a placebo. Discomfort may have other causes, such as the alcohol itself, allergies, or irritable bowel syndrome.

Expert Perspectives & Protocol Breakdown

Imke Reese and Margitta Worm (AWMF Guideline, DGAKI and other specialist societies)

What they advocate: Imke Reese is the lead author and Margitta Worm is the coordinating author of the AWMF-S1 guideline on intolerance to orally ingested histamine, published by DGAKI, GPA, AeDA, SGAI, and ÖGAI. The guideline focuses on a three-stage nutritional plan, considers laboratory-based diagnostics to be inconclusive, and does not recommend DAO supplements. It also notes that women observe increased symptoms premenstrually.

→ Source: AWMF Guideline 061-030

Wolfgang J. Schnedl and Dietmar Enko (Authors of the review "Histamine Intolerance Originates in the Gut")

What they advocate: Both authors view histamine intolerance primarily as a disorder originating in the gut. They consider a thorough medical history to be the most important basis for diagnosis; a low serum DAO level can support it. They describe a low-histamine diet and DAO capsules as helpful for managing symptoms.

→ Source: Schnedl WJ, Enko D – Histamine Intolerance Originates in the Gut, Nutrients (2021)

Dr. Mark Hyman and Dr. Elizabeth Boham (Functional Medicine, USA)

What they advocate: In the podcast, they emphasize that histamine intolerance is often not lifelong. The important question is what triggers the symptoms for the individual. They cite stress, medication, mold, and gut problems as triggers, see DAO supplements as a potential aid, and mention nutrients like vitamin B6, vitamin C, and magnesium. According to them, high estrogen levels hinder histamine degradation, and women in perimenopause often experience a worsening of symptoms. In the discussion, they do not cite any study that we could verify for this hormonal claim.

→ Source: The Dr. Hyman Show – What is Histamine Intolerance? (with Dr. Elizabeth Boham)

Consumer Protection Centre and aha! Swiss Allergy Centre (Institutions)

What they advocate: The Consumer Protection Centre considers the benefits of DAO supplements scientifically unproven and recommends consultation with a nutritional professional. The Swiss Allergy Centre advises against DAO and histamine blood tests, does not consider a strict diet necessary, and views DAO before meals as a potential trial option if needed.

→ Sources: Verbraucherzentrale · aha! Swiss Allergy Centre

Where They Differ

All sources agree that histamine intolerance is difficult to diagnose and that a time-limited, structured dietary change followed by reintroduction is the sensible path forward. They disagree on two points. First, on DAO capsules: The guideline and the Consumer Protection Centre advise against them or see no evidence, while Schnedl and Enko, Hyman, and the Swiss Allergy Centre consider them a possible option. Second, on the blood test: Schnedl and Enko see a low serum DAO as support, while the guideline and the Swiss specialist centre do not. The hormonal thesis by Hyman and Boham is not supported by any of the guidelines.

What the Evidence Says

The best-supported approach is using a diary, medical clarification, and time-limited dietary changes, even if the level of evidence is low (S1). Regarding the cycle, there are descriptive indications of fluctuating DAO levels and increased symptoms before the period. For hormones as a cause, menopause, micronutrients, and DAO capsules, there is a lack of large, independent, placebo-controlled studies. The statements of functional medicine should be read as expert opinion, not as validated treatment.

Shopping at VEYT: What we consciously do not recommend and what you should know

VEYT does not have a product for histamine intolerance that we could honestly recommend, which is why there is no product card here. Nutrients like magnesium or vitamin C are justified if there is a proven deficiency, but they are not a solution for histamine. This also applies to our own products.

Dietary supplements are no substitute for a balanced diet or medical treatment. In case of pregnancy, breastfeeding, illness, or regular medication intake, please consult a doctor beforehand.

Frequently asked questions about histamine intolerance in women

Histamine intolerance symptoms in women: How do I recognize them?

Typical symptoms include flushing, itching, abdominal discomfort, diarrhea, headaches, palpitations, and, in women, menstrual cycle-related symptoms. However, these symptoms are non-specific. The only meaningful indicator is a reproducible pattern after specific meals that is medically evaluated.

Histamine intolerance: What really helps?

The best-supported method is a time-limited nutritional plan according to the guideline: 10 to 14 days of elimination, up to 6 weeks of reintroduction, followed by an individual diet. Antihistamines can be used for acute discomfort under medical supervision. The benefits of supplements are not sufficiently proven.

What should you not eat if you have histamine intolerance?

According to AGES, fermented foods such as raw sausage, anchovies, aged cheese, and sauerkraut are considered particularly high in histamine. Which foods actually pose a problem for you is individual. The Swiss Allergy Centre does not consider a strict long-term diet necessary.

Histamine intolerance test: Is there a reliable test?

No. The AWMF guideline does not describe a reliable diagnostic procedure and attributes no diagnostic significance to serum DAO. The Swiss Allergy Centre advises against blood and urine tests for DAO and histamine. A diary and a supervised dietary trial are recommended.

Is histamine intolerance worse in the second half of the cycle?

Some women report this, and the AWMF guideline describes more premenstrual symptoms. However, measured DAO activity was higher in the luteal phase than in the follicular phase. A simple connection is therefore not proven. A cycle calendar alongside your diary can clarify this for you personally.

Histamine intolerance tablets: Do DAO capsules help?

This is controversial. One small study found benefits compared to placebo, but the guideline does not recommend DAO supplements and the Consumer Protection Centre sees the benefits as unproven. Anyone trying them should do so for a limited time and after consultation with a doctor.

Does magnesium help with histamine intolerance?

There is no evidence for this in the studies and guidelines we have reviewed. Magnesium is mentioned as supportive by some functional medicine experts. If there is a proven magnesium deficiency, it may make sense, but not as a remedy for histamine intolerance.

Histamine intolerance after 40 or during menopause: Does it get worse?

This is not proven by controlled studies. Individual doctors describe a worsening during perimenopause. Hot flashes and palpitations can resemble histamine symptoms, which is why medical clarification is important.

Can histamine intolerance improve during pregnancy?

Yes, for many women. In an observational study of 30 pregnant women, symptoms improved in 27, and DAO activity increased significantly. The study was small and lacked a control group; furthermore, no diet should be started during pregnancy without medical supervision.

References & Scientific Citations

• AWMF-S1 Guideline 061-030 on intolerance to orally ingested histamine (Reese, Worm et al.)
• Comas-Basté O et al. – Histamine Intolerance: The Current State of the Art, Biomolecules (2020)
• Hrubisko M et al. – Histamine Intolerance: The More We Know the Less We Know, Nutrients (2021)
• Schnedl WJ, Enko D – Histamine Intolerance Originates in the Gut, Nutrients (2021)
• Jackson K et al. – Evidence for Dietary Management of Histamine Intolerance, Int J Mol Sci (2025)
• Komericki P et al. – Histamine intolerance: lack of reproducibility of single symptoms by oral provocation with histamine, Wien Klin Wochenschr (2011)
• Duelo A et al. – Improvement of Histamine Intolerance Symptoms in Pregnant Women with Diamine Oxidase Deficiency, J Clin Med (2025)
• Bartra J et al. – Study protocol: Low-Histamine Diet and DAO supplementation for histamine intolerance, Nutrients (2025)
• Verbraucherzentrale – Dietary supplements for histamine intolerance
• Verbraucherzentrale NRW – Advertising claim for histamine tablet “Daosin” is inadmissible according to court ruling
• aha! Swiss Allergy Centre – Histamine intolerance
• AGES (Austria) – Biogenic amines
• DocCheck – Histamine intolerance: much suspicion, little evidence
• The Dr. Hyman Show – What is Histamine Intolerance? (with Dr. Elizabeth Boham)

Source transparency: The mentioned physicians and authors are used as sources of perspective. Statements regarding diagnosis and treatment are primarily classified based on the AWMF guideline, review articles, and controlled or prospective studies. Expert opinion, observational data, and clinical efficacy evidence are not equated. The figures for the placebo response originate from a DocCheck article and were not verified against the original study. This article was written independently; all other figures were verified against the linked sources.