Food Intolerance & Sensitivity Test (Free)

Not sure if a food is triggering bloating, headaches, fatigue, skin issues, or other symptoms? This free online Food Sensitivity & Intolerance Test helps you spot patterns and understand whether your experience is more consistent with an intolerance, a sensitivity, or a possible allergy red flag.

In about 5–7 minutes, you’ll answer a few questions about your symptoms, timing, and common triggers. You’ll get a clear summary of potential intolerances or sensitivities plus practical next steps you can take safely.

Important: This tool is educational and cannot diagnose medical conditions. If you’ve ever had symptoms like trouble breathing, facial/throat swelling, or signs of anaphylaxis, seek urgent medical care.

Note: Our tool will not load if you are connected to a VPN.

What To Do With Your Food Intolerance Results

If your results suggest: More consistent with food intolerance
Food intolerances often relate to digestion (like lactose, certain FODMAPs, or sugar alcohols). The next step is usually structured tracking and a guided trial with careful reintroduction.

If your results suggest: More consistent with food sensitivity
Food sensitivities can feel less predictable and may involve delayed symptoms (like headaches, fatigue, skin flares, or brain fog). A personalized plan helps you avoid overly restrictive diets while still finding the “needle in the haystack.”

If your results flag possible allergy red flags
Don’t trial an elimination/reintroduction on your own. It’s safest to speak with a medical professional or allergist.

Want a Clear Plan Without Compromise?

A Registered Dietitian can help you:

• Interpret your results and organize the most likely triggers
• Build a step-by-step elimination + reintroduction plan (when appropriate)
• Support gut health, symptom relief, and food confidence
• Keep nutrition balanced so you don’t end up under-eating or overly restricted

Food Intolerance & Sensitivity FAQ’s

1) Is this Food Intolerance Test a medical diagnosis?

No. This Food Intolerance Test is an educational screening tool that helps you identify patterns to discuss with a qualified professional. It can’t diagnose an intolerance, sensitivity, allergy, or medical condition.

2) What’s the difference between a food intolerance and a food sensitivity?

In general, a food intolerance commonly involves digestive symptoms and is often related to how your body breaks down certain foods. A food sensitivity can be more variable and may include delayed symptoms that aren’t only digestive (for example, headaches, fatigue, or skin changes). This tool helps you see which pattern fits best.

3) Can this tool identify a food allergy?

It can’t diagnose an allergy, but it does screen for red-flag symptoms (like trouble breathing, swelling, or anaphylaxis history). If those apply to you, seek medical advice promptly.

4) How long does the Food Sensitivity Test take?

Most people finish the Food Sensitivity Test in about 5–7 minutes.

5) Should I do an elimination diet after taking the test?

Not automatically. Eliminating too many foods can backfire. If you choose to try an elimination and reintroduction approach, it’s best done structured and time-limited, ideally with professional guidance.

6) What are common triggers for food intolerance symptoms?

Common examples include lactose (dairy), high-FODMAP foods, sugar alcohols, greasy foods, caffeine, alcohol, and large portions. Your personal triggers may be different — tracking timing and symptoms matters.

7) What are common triggers for food sensitivity symptoms?

Some people report issues with high-histamine foods, certain additives, spicy foods, or specific carbohydrate types. Many “sensitivities” overlap with gut health, stress, sleep, and overall diet pattern — which is why a personalized approach is helpful.

8) Can stress or sleep affect symptoms that feel like food intolerance?

Yes. Stress, sleep, hydration, meal timing, and even anxiety around eating can amplify symptoms. This test includes questions that help account for those variables.

9) Do you work with clients virtually?

Yes — Diet Redefined offers virtual appointments, and you can book an assessment through the link on this page.

10) What should I track to get clearer answers?

Track: what you ate, portion size, timing, symptoms, symptom severity, and anything else that may affect symptoms (sleep, stress, cycle, alcohol, workouts). Consistency for 7–14 days is often enough to reveal patterns.