You must meet two criteria to begin the reintroduction phase of the autoimmune protocol (AIP):
Follow the strict AIP elimination diet for at least four to six weeks.
Experience an improvement or resolution of autoimmune-related symptoms.
During the reintroduction phase, you will “challenge” foods one at a time to determine which ones may trigger your symptoms.
If a food causes symptoms, you will continue avoiding it, but if you don’t observe any symptoms, you can add it back into your diet.