How is food intolerance treated?

Food intolerance is different from a food allergy: it usually concerns how the digestive system handles a food rather than an immediate immune reaction. Bloating, abdominal discomfort, diarrhoea or nausea may follow a particular ingredient, amount or combination of foods. Similar symptoms can have other causes, so a clear history helps prevent an overly restrictive diet. The timing, portion size and pattern of symptoms are useful details to record.

Keep a food and symptom diary, including portions and timing, then review it with a clinician or dietitian. Treatment may involve reducing a portion, spacing foods differently, choosing a suitable alternative or avoiding a specific ingredient for a planned period. Some people need help with lactose, fermentable carbohydrates or another dietary component, but broad elimination diets should be supervised so that fibre, protein and essential nutrients are not lost. Food intolerance testing may be discussed, although no single test explains every digestive symptom. Reintroducing foods in a structured way can help clarify tolerance when it is safe.

Arrange medical assessment for persistent diarrhoea, ongoing vomiting, blood in the stool, unexplained weight loss, severe abdominal pain, fever or symptoms that wake you at night. Seek urgent help for facial swelling, breathing difficulty, faintness or a rapidly worsening reaction, as these features can indicate allergy rather than intolerance. Prompt review is also sensible when symptoms begin after a new medicine, follow travel or lead to signs of dehydration.

Could another digestive condition explain my symptoms? Which food should I trial removing, and for how long? Would food intolerance testing or nutrition counselling help me test changes safely?