Once the allergen has been identified, the next step is to eliminate it from your diet. Initially, you should completely refrain from eating all allergenic foods for 60-90 days. After this period, you can begin to slowly reintroduce them into your diet. You should also vary the foods you eat on a daily basis to avoid developing new allergies. In most cases, this diet allows the body to repair intestinal barrier function, enabling patients to reintroduce the reactive foods into their diets. Eliminating an allergenic food can cause withdrawal reactions, so be prepared and know that it is normal.