What should you know about a FIT food intolerance test?

Food intolerance usually describes difficulty digesting or responding to a food without the immediate immune reaction associated with many food allergies. Symptoms may include bloating, abdominal discomfort, diarrhoea, or wind, and can be delayed. No single test identifies every intolerance. A result must be considered alongside what you ate, when symptoms began, other illnesses, and medicines.

Keep a short food and symptom diary, including portions, timing, bowel changes, and other factors such as stress or infection. Do not remove many foods for a prolonged period without professional guidance, because nutritional gaps can develop. A clinician or dietitian may suggest a structured elimination followed by careful reintroduction when appropriate. Explore evidence-based Food Intolerance Testing and Nutrition Counselling.

Arrange assessment for persistent diarrhoea, unexplained weight loss, blood in the stool, nighttime symptoms, anaemia, or severe abdominal pain. Seek urgent help for swelling of the lips or tongue, breathing difficulty, collapse, or a rapidly spreading itchy rash after eating; these may indicate an allergic emergency rather than intolerance.

Which conditions should be excluded first? Is this test validated for my symptoms? Should I keep eating the suspected food before assessment? How can I reintroduce foods safely and maintain balanced nutrition?