This questionnaire is meant to help you better understand whether your symptoms may follow patterns that are often seen in histamine intolerance (HIT) or mast cell activation syndrome (MCAS). It is not a diagnostic tool, and it cannot tell you whether you do or do not have a medical condition.
Instead, it provides an educational overview of potential risk patterns and areas that may be helpful to explore further. Many of these symptoms can have multiple causes, and only a qualified healthcare professional can evaluate them in the context of your full medical history.
Your results are intended to support awareness and informed conversations, not to replace medical care or diagnosis.
The assessment will refer to histamine-related foods. These can be foods that contain histamine, release histamine, or inactivate DAO, the enzyme that breaks down histamine in the intestines. This is not a complete list and varies by individual.
High Histamine Foods
Alcohol
Pickled or canned foods (sauerkraut)
Matured cheeses
Smoked meats (salami, ham, sausages)
Shellfish
Beans and pulses (chickpeas, soybeans, peanuts)
Nuts (walnuts, cashews)
Chocolate and cocoa products
Most citrus fruits
Wheat-based products
Vinegar
Ready meals
Salty snacks, sweets with preservatives and artificial colorings
Foods That Release Histamine
Most citrus fruits (kiwi, lemon, lime, pineapple, plums)
Cocoa and chocolate
Nuts
Papaya
Beans and pulses
Tomatoes
Wheat germ
Additives (benzoate, sulphites, nitrites, glutamate, food dyes)
Foods That Block DAO
Alcohol
Black tea
Energy drinks
Green tea
Mate tea