What is the process called for re-introducing substances suspected to cause a food allergy or intolerance after an elimination diet?

The process of re-introducing substances suspected to cause a food allergy or intolerance after an elimination diet is known as a food challenge. This method is typically performed under medical supervision to determine whether a specific food indeed triggers an allergic reaction or intolerance. The food challenge involves consuming the suspected allergens in controlled doses and observing the individual's reactions.

Conducting such a challenge is crucial for accurate diagnosis; as it helps differentiate between actual food allergies or intolerances and other non-food-related issues. This process can also guide individuals on whether they need to permanently avoid certain foods or if they can safely reintroduce them after an elimination phase.

In contrast, while a food tolerance test may assess overall food tolerances, it is not the same as systematically reintroducing and observing specific foods. Similarly, a food allergy assessment is more general and may involve questionnaires, patient history, and skin tests rather than the direct challenge method. Food sensitivity screening often involves blood tests and is less about the direct experience of food intake.