Do I Have Histamine Intolerance? Free 15-Question Quiz
This free histamine intolerance quiz assesses your symptom pattern across 15 questions covering digestion, skin, neurology, cardiovascular symptoms, and lifestyle triggers. Answer honestly based on your experience over the past 3 months. You will receive a personalised result with a likelihood score and specific next steps.
This symptom checker covers the 24 most common signs of histamine intolerance — from obvious ones like hives and headaches to less obvious ones like heart palpitations, insomnia, and anxiety that appears shortly after eating. Answer each question based on your typical experience over the past 3 months, not just recent days.
The quiz takes about 3 minutes. At the end, you’ll receive a score indicating low, moderate, or high likelihood of histamine intolerance, along with specific next steps based on your symptom pattern.
This quiz does not constitute a medical diagnosis. A high score indicates histamine intolerance is worth investigating — ideally with a DAO blood test or an elimination diet trial under professional supervision.
How to use your results
A score in the moderate-to-high range is meaningful. Most people with confirmed histamine intolerance score 12 or above on this checklist — not because the threshold is clinically validated, but because the symptom pattern becomes unmistakeable once you know what you’re looking at.
If your score is high, the most useful next step is a 2-week elimination trial: remove the top histamine foods, note what changes, then systematically reintroduce.
The elimination diet plan walks through this process in detail.
If your score is moderate, consider keeping a food and symptom diary for two weeks before changing anything. Patterns that aren’t obvious day-to-day become clear on paper.
How the histamine intolerance quiz works
The quiz assigns a weighted score to each answer based on its diagnostic significance. Some symptoms — such as consistent reactions to wine, aged cheese, and leftovers — carry higher weight because they are more specific to histamine intolerance. Others, like general fatigue, are common to many conditions and contribute lower scores.
The maximum score is 45. Scores above 23 indicate that histamine intolerance is a likely explanation for your symptoms and warrant further investigation. Scores above 34 suggest the pattern is strongly consistent with histamine intolerance.
What to do after taking the histamine intolerance quiz
Regardless of your score, the most reliable diagnostic tool available is a strict 4-week low-histamine elimination diet followed by systematic reintroduction. This costs nothing, requires no testing, and gives you a clear answer based on your own body’s response.
If your score was high (23 or above), consider also requesting a DAO enzyme blood test through your GP or a private functional medicine practitioner. A low DAO result alongside a positive dietary response is the strongest available confirmation of histamine intolerance.
If your score suggests histamine intolerance is very likely (34+), also consider whether MCAS overlap or an underlying condition like SIBO may be contributing — particularly if dietary management alone produces only partial improvement.
About This Histamine Intolerance Quiz
How accurate is this histamine intolerance quiz?
This quiz identifies whether your symptom pattern is consistent with histamine intolerance — it does not diagnose it. No symptom-based questionnaire can do that definitively. What it does well is flag whether the pattern of your symptoms (their type, timing, and relationship to food) matches what is typically seen in histamine intolerance, helping you decide whether further investigation is warranted. A high score is a meaningful signal. A low score suggests histamine may not be the primary driver, though it doesn’t rule it out entirely, particularly if your symptoms are mild or intermittent.
What should I do after getting a high quiz score?
A score of 23 or above indicates histamine intolerance is a likely explanation and warrants proper investigation. The most practical next step is a strict 4-week low-histamine elimination diet — remove all high-histamine, histamine-liberating, and DAO-blocking foods and observe what changes. This is the gold-standard diagnostic approach used by functional medicine practitioners because it’s both free and highly informative. You can also request a DAO enzyme blood test through your GP or a private practitioner — a low result alongside dietary improvement is the strongest available confirmation of the condition.
Can this quiz distinguish between histamine intolerance and MCAS?
Not definitively — both conditions share many symptoms, and the quiz is not designed to separate them. The key clinical differences are: histamine intolerance is primarily triggered by dietary histamine with dose-dependent reactions, while MCAS involves mast cells releasing histamine and other mediators spontaneously or in response to diverse triggers (temperature, stress, fragrances, medications) beyond food. People with very high quiz scores who see only partial improvement from dietary changes, or who react to non-food triggers, should consider MCAS as a contributing or alternative diagnosis. See our histamine intolerance vs MCAS guide for a detailed comparison.
I scored low but still think I have histamine intolerance — what now?
A low quiz score doesn’t rule out histamine intolerance, particularly if your symptoms are mild, intermittent, or don’t fit neatly into the typical pattern. The most reliable test is still the elimination diet — if your symptoms improve significantly during 4 weeks of strict elimination and return when you reintroduce high-histamine foods, that’s meaningful evidence regardless of any questionnaire result. Consider keeping a detailed food and symptom diary for two weeks before starting an elimination, to capture patterns that may not be obvious without a structured record.
Is there a blood test for histamine intolerance?
Yes — DAO enzyme activity can be measured via a blood test. Low DAO activity provides supporting evidence for histamine intolerance, though the test has limitations: DAO levels fluctuate and can be temporarily reduced by many factors including gut inflammation, alcohol, certain medications, and nutritional deficiencies. A positive result (low DAO) is helpful; a normal result doesn’t definitively rule out the condition. The elimination-rechallenge diet remains the most informative diagnostic tool. Some private functional medicine practitioners also measure whole-blood histamine levels alongside DAO, which gives a more complete picture.
Medical disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any supplement regimen.