human
I've heard that a lot of people are taking a gluten-free diet. What is gluten and why do so many people avoid it?
assistant
Gluten is a protein found in wheat, barley, rye, and oats. It’s a common allergen for some people, especially those with Celiac disease. People who have Celiac disease must follow a gluten-free diet to avoid damage to the lining of their small intestine. The symptoms of Celiac disease can range from digestive problems such as bloating, diarrhea, or constipation, to more serious health issues like fatigue, anemia, joint pain, or even osteoporosis.