An estimated 1.8 million Americans in the U.S. have celiac disease and roughly 1.4 million of them are unaware. Results from a Mayo Clinic study, published in The American Journal of Gastroenterology , indicate that celiac disease is more common than previously thought, and most people don't know they have the disease. Joseph Murray, M.D., Mayo Clinic gastroenterologist and a study author, says, “We now have an accurate and robust measure of how common celiac disease is in the U.S. population. We believe this is the definitive measurement of the incidences of both diagnosed and undiagnosed celiac disease.” Researchers also determined that 1.6 million people in the United States are on a gluten-free diet without diagnosis of celiac disease. Sound bites with Dr. Murray are available in the the downloads. Expert title for broadcast cg: Dr. Joseph Murray, Mayo Clinic Gastroenterologist Read entire news release.