Histamine Intolerance: Causes, Symptoms & Diet
Histamine intolerance refers to the reduced ability of the body to break down histamine from food. Common symptoms include headaches, skin reactions, and gastrointestinal complaints.
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Histamine intolerance refers to the reduced ability of the body to break down histamine from food. Common symptoms include headaches, skin reactions, and gastrointestinal complaints.
What Is Histamine Intolerance?
Histamine intolerance describes an oversensitivity to histamine, a biogenic amine naturally found in many foods and also produced by the body itself. In affected individuals, the capacity to adequately break down ingested histamine is impaired, causing histamine to accumulate in the bloodstream and trigger a wide range of symptoms. Histamine intolerance is not a classic allergy but rather a metabolic disorder.
Causes
The primary cause of histamine intolerance is a deficiency or reduced activity of the enzyme diamine oxidase (DAO), which breaks down histamine in the small intestine. Additional contributing factors include:
- Genetic predisposition (inherited DAO deficiency)
- Intestinal disorders (e.g., Crohn's disease, celiac disease, irritable bowel syndrome)
- Use of certain medications that inhibit DAO activity (e.g., some antibiotics, pain relievers, antidepressants)
- Alcohol consumption, which inhibits DAO activity
- Estrogen dominance, as estrogen can promote histamine release
Symptoms
The symptoms of histamine intolerance are diverse and can affect multiple organ systems. Common complaints include:
- Headaches and migraines
- Skin flushing, itching, and hives (urticaria)
- Runny or blocked nose, sneezing
- Gastrointestinal issues such as abdominal pain, bloating, and diarrhea
- Rapid heartbeat (tachycardia)
- Menstrual discomfort in women
- Sleep disturbances and fatigue
Symptoms typically appear shortly after consuming histamine-rich foods.
Diagnosis
Diagnosing histamine intolerance is challenging and usually involves the exclusion of other conditions such as food allergies or mastocytosis. Diagnostic approaches may include:
- Food diary: Tracking symptoms in relation to food intake
- Elimination and provocation diet: Removing histamine-rich foods and systematically reintroducing them
- DAO activity testing: A blood test measuring DAO enzyme activity (limited diagnostic reliability)
- Exclusion of allergies through skin-prick tests or specific IgE measurements
High-Histamine Foods
Certain foods contain high levels of histamine or trigger its release in the body. These include:
- Aged cheeses (e.g., Parmesan, Gouda, Camembert)
- Cured meats and smoked products
- Fish and seafood (especially canned or not fresh)
- Red wine, beer, and other alcoholic beverages
- Fermented foods (e.g., sauerkraut, vinegar, soy sauce)
- Tomatoes, spinach, avocado, strawberries
- Chocolate and cocoa
Treatment and Dietary Management
There is currently no curative treatment for histamine intolerance. Management focuses on reducing histamine exposure and relieving symptoms.
Low-Histamine Diet
The most effective measure is adopting a low-histamine diet, prioritizing fresh and minimally processed foods. This dietary change is ideally undertaken with guidance from a nutrition specialist to prevent nutrient deficiencies.
DAO Supplements
Dietary supplements containing the enzyme diamine oxidase (DAO) can support the body's own enzyme activity and are often taken before histamine-rich meals. Effectiveness varies between individuals.
Medication
In some cases, antihistamines (histamine H1-receptor blockers) may be used to relieve acute symptoms. Any medication use should always be discussed with a healthcare professional.
Treatment of Underlying Conditions
If an intestinal disease is identified as a contributing cause, targeted treatment of that condition is recommended, as a healthy intestinal lining can positively influence DAO activity.
References
- Maintz L, Novak N. Histamine and histamine intolerance. American Journal of Clinical Nutrition, 85(5):1185-1196, 2007. DOI: 10.1093/ajcn/85.5.1185
- Reese I et al. Guideline on management of suspected histamine intolerance due to oral histamine intake. Allergo Journal International, 26(2):72-79, 2017.
- Schink M et al. Microbial patterns in patients with histamine intolerance. Journal of Physiology and Pharmacology, 69(4):579-593, 2018.
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