Food allergies and intolerances, such as those to gluten and dairy, can manifest as digestive distress or skin rashes. Managing these conditions involves strict diet modification and symptom tracking.
People who for religious or health reasons need to avoid alcohol often have concerns about hidden alcohol in foods. No foods naturally contain alcohol -- except alcohol -- but some foods have alcohol added, although the amounts are usually very small.
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Over 15 million Americans have food allergies, according to the Food Allergy and Anaphylaxis Network. Certain foods are more likely to cause allergic reactions than others.
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Quinine, a bitter tasting powder made from the bark of the cinchona tree, is known mainly for its use in malaria treatment.
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