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Food sensitivity testing is widely sold and widely misunderstood, so it is worth being clear about what it can and cannot do. Used honestly, as one input within a guided elimination and reintroduction plan rather than a standalone diagnosis, it can help us structure the process of identifying foods that do not agree with you.
There isn't one test that can diagnose every food sensitivity. Assessment starts with understanding your symptoms, when they occur, your usual eating pattern, and any foods you've already noticed may be contributing. A detailed health history often provides the most valuable clues.
Depending on your symptoms, we may recommend targeted testing to rule out other conditions or gather additional information. In some cases, IgG food sensitivity testing may be considered as one piece of the puzzle, but results are always interpreted alongside your symptoms and clinical history and they’re never used on their own to diagnose a food sensitivity.
When appropriate, we guide you through a structured elimination and reintroduction process, which remains one of the most reliable ways to identify whether a particular food is contributing to your symptoms.
Food sensitivities and intolerances are different from food allergies. Rather than causing an immediate immune reaction, food sensitivities may contribute to delayed symptoms that can develop hours, or sometimes days, after eating. These symptoms vary from person to person and may include bloating, digestive discomfort, headaches, skin concerns, fatigue, or changes in energy.
Delayed food sensitivity symptoms can make it difficult to identify true food triggers. As a result, many people either eliminate foods unnecessarily or continue avoiding foods that aren't contributing to their symptoms. A personalized assessment helps minimize unnecessary restriction while supporting a balanced, nutrient-rich diet.
Food sensitivity testing can provide information, but results need to be interpreted carefully. Some IgG-based food sensitivity tests may reflect that your body has been exposed to a food rather than confirming that the food is causing symptoms.
That’s why we don’t use a lab report alone to create a long list of foods to avoid. Testing, when appropriate, is used alongside your symptoms, health history, and a structured elimination and reintroduction process to help identify meaningful patterns.
Removing multiple foods without guidance may increase the risk of nutritional gaps, especially for nutrients like iron, calcium, fibre, and adequate energy intake. Support can help make the process more structured, temporary, and useful, so you’re identifying patterns rather than simply ending up with a longer list of foods to avoid.
Sources: peer-reviewed reviews of food intolerance prevalence. Sources: Dalhousie Agri-Food Lab (2021); Choosing Wisely Canada (2025); CSACI (2025).
The goal isn't to eliminate as many foods as possible: it’s to help you eat the widest, most nourishing diet your body comfortably tolerates. Treatment depends on what's contributing to your symptoms and may include supporting gut health, addressing digestive enzyme deficiencies, using a time-limited elimination and reintroduction plan, and ensuring your nutritional needs continue to be met throughout the process.
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