A food allergy is an exaggerated immune response triggered by eggs, peanuts, milk, or some other specific food. Known also as allergy to food
Normally, your body’s immune system defends against potentially harmful substances, such as bacteria, viruses, and toxins. In some people, an immune response is triggered by a substance that is generally harmless, such as a specific food.

The cause of food allergies is not fully understood, because they can produce such a variety of symptoms. Reactions to foods may vary from mild to fatal.
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