Does a certain food not sit well with you? Learn the basics about food sensitivities and intolerances and what kinds of tests are available to identify them.
Substance (e.g., ragweed pollen) that can cause an allergy
Wondering how allergies are diagnosed? Get the details about the types of allergy testing and how they can identify problematic seasonal or food allergies.
A type of tissue cell found throughout the body but especially in connective tissue such as the skin, lining of the intestine and air passages as well as in the bone marrow. Mast cells contain granules that store chemicals. These chemicals are released as part of the body's normal response to injury but also may be released as part of an allergic...

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