Severe food allergies can be helped by dissolving cromolyn sodium (brand name Gastrochrom) in hot water to gargle and swallow 20 minutes before meals. It will adhere to the mast cells in your digestive system and keep them quiet so they do not initiate an allergy response. After a few days of regular use your gut will begin to heal. Continue to avoid known food triggers for 6 months then a rare exposure to a food allergen should cause little or no response.