You may not have celiac disease — an autoimmune disorder triggered by consuming the gluten protein in wheat, barley, and rye — but it’s possible you have gluten intolerance. Gluten intolerance can ...

Cystic fibrosis (CF) is a genetic disease that causes a buildup of mucus in organs throughout the body. Stool, or feces, can indicate how your gastrointestinal tract is functioning and whether ...