Currently, the only way to treat food allergies is to avoid the foods that trigger reactions. Even the most diligent label-readers and ingredient-checkers likely will be inadvertently exposed to proteins that elicit an allergic response at some point. That's why Wood, Sarah and others with food allergies severe enough to cause anaphylactic reactions should wear medical alert bracelets or necklaces and carry a syringe of adrenaline (epinephrine) obtained by prescription from their physicians.
Anaphylactic allergic reactions can be fatal even when they begin with mild symptoms such as a tingling in the mouth and throat or gastrointestinal discomfort. Antihistamines and bronchodilators can be used to treat less severe symptoms.