Has anyone ever been completely cured from food allergies?

Yes: And it depends on the food allergy. Peanut allergies tend to be for life. Many other food allergies are related to an inflamed gut and when you get off those foods awhile the gut can heal. Dairy is high in hormones and pesticides. Gluten is genetically modified a lot and can cause gut problems. Try being dairy and gluten free for a month and see if you notice you feel better.