See gastrointestinal tract.

A constant feeling of a lump in the throat that is usually related to stress.

A simple sugar the body manufactures from carbohydrates in the diet. Glucose is the body

An amino acid needed for maintaining health of the intestinal lining.

A protein found in wheat, rye, barley, and to a lesser degree, oats. In people with celiac disease, gluten damages the lining of the small intestine or causes sores on the skin. See celiac disease.

See celiac disease.

A general term that refers to celiac disease and dermatitis herpetiformis.

The stored form of sugar in the liver and muscles that releases glucose into the blood when cells need it for energy. Glycogen is the chief source of stored fuel in the body.

A group of birth defects that changes the way the liver breaks down glycogen.

A type of immune reaction seen in some diseases in which the body encapsulates the offending substance.