<<Disclaimer: Verify this information before applying it to your situation.>> Barbara, sorry but I don't have Dr. Oppenheimer's Complete Book of Better Digestion, just the cite shown. The publisher is Rodale, they are big in organic gardening, 'natural' approaches to health. Might find it at either a large bookstore or a large health food store. Perhaps someone else has it, could provide further details on his association between Type O blood and celiac, and perhaps his source if he shows one in the text, footnotes, or bibliography. Douglas in Pittsburgh The only thing necessary for the triumph of evil <[log in to unmask]> is for good men to do nothing - Edmund Burke