The document discusses gluten sensitivities and celiac disease. It explains that gluten is a protein found in grains, and that celiac disease involves damage to the small intestine from gluten. It notes that 30-40% of Americans carry the gene for celiac disease but only 1-2% have developed the disease, often due to environmental triggers. For those with celiac disease, the only treatment is a lifelong gluten-free diet. The document provides information on symptoms, diagnosis, gluten-free food options and lifestyle changes.