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Food intolerance and other reactions. There are a number of reactions to food that cause similar symptoms to a food allergy. Depending on the type of food intolerance you have, you may be able to eat small amounts of problem foods without a reaction.ommon conditions that can cause symptoms mistaken for a food allergy include: 1  Absence of an enzyme needed to fully digest a food. 2  Food poisoning. 3  Sensitivity to food additives. 4  Histamine toxicity.
Other kinds of reactions to foods that are not food allergies include food intolerances (such as lactose or milk intolerance), food poisoning, and toxic reactions. Food intolerance also is an abnormal response to food, and its symptoms can resemble those of food allergy.