Migraines. Mouth ulcers. Creaky, arthritic knees. Diarrhea. Are these four unrelated complaints, or the body's reaction to a food it can't handle? Despite its encyclopedic title, this is an entertaining book as well as an enlightening one that is both fascinating and highly readable. It's also scary, telling us that some of the foods that are ubiquitous in our diets--wheat and milk products--may be making us miserable in ways we never imagined.