Histamine Intolerance: Why Your Body Might Be Reacting to Common Foods

Histamine intolerance is a condition where the body struggles to break down histamine properly. This can lead to a range of symptoms, from digestive problems to skin reactions. The issue often stems from high histamine levels or an inability to process them effectively.

Histamine plays a key role in digestion, immune responses, and brain signalling. However, when levels rise too high or the body can't break it down, intolerance symptoms appear. Common triggers include genetics, certain medications, gut disorders, diet, or bacterial overgrowth in the intestines.

Gastrointestinal issues are the most frequent signs, such as bloating, diarrhoea, constipation, and nausea. Other symptoms may involve headaches, fatigue, itchy skin, irregular heartbeats, and dizziness. Some people also experience nasal congestion, anxiety, or swelling in tissues.

Doctors diagnose the condition through elimination diets, blood tests for DAO enzyme deficiency, or prick tests. Treatment usually involves dietary changes, antihistamines, or DAO supplements—though more research is needed on the latter. Foods high in histamine, like alcohol, fermented products, aged cheese, and processed meats, are often restricted. Instead, fresh meats, non-citrus fruits, eggs, and certain vegetables are recommended.

Histamine intolerance is linked to other gut-related conditions, including IBS, coeliac disease, and small intestinal bacterial overgrowth. While exact numbers in Germany are unclear, estimates suggest around 1% of people may be affected by widespread food intolerances like this one.

Managing histamine intolerance relies on diet adjustments, medication, and sometimes enzyme support. Those affected must avoid high-histamine foods and monitor symptoms closely. Further research could help refine treatment options in the future.