It is estimated that 1 out of every 100 to 150 people have celiac disease, but only about 3 percent of those cases have been diagnosed. Celiac disease is a genetic autoimmune disease in which the digestive system is unable to obtain nutrients from food. The digestive system is disrupted by the common food ingredient gluten. Once diagnosed with celiac disease, the treatment is always the same: a gluten-free diet. This book describes everything a person needs to know about symptoms and diagnosis, how to read food labels to become a "gluten detective," and how to maintain a gluten-free lifestyle.