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What is food allergy?

Some people react with what doctors call a hypersensitivity reaction when eating certain foods or additives. Typically it is commonly used foods that cause the reactions.

For an adverse reaction to be called a food hypersensitivity, the symptoms of an individual must be of a certain kind, specifically:

  • Appear when a person eats the problem food
  • Disappear or diminish when a person avoids the problem food, and
  • Reappear when the person reintroduces the problem food.

Food hypersensitivity is divided into two types, food allergy and non-allergic food hypersensitivity. See the subpages for more information.

Food hypersensitivity

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Nomenclature for allergy: