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 some other grains. It’s what gives bread its chewy texture and helps give beer its foam. People who have celiac disease or gluten sensitivity can't digest gluten properly, which causes inflammation in the small intestine. Symptoms of celiac disease include fatigue, bloating, abdominal pain, constipation, diarrhea, weight loss, and iron deficiency.