human
I've heard that some people are allergic to gluten. Is this true?
assistant
Yes, it is true that some people have allergies to gluten. Gluten is a protein found in wheat, rye and barley. People with celiac disease must avoid all foods containing gluten, as they can experience serious health problems if they consume it. However, many people who do not have celiac disease may still be sensitive to gluten. This condition is called non-celiac gluten sensitivity (NCGS). Symptoms of NCGS can include digestive issues such as bloating, gas, diarrhea, constipation, fatigue, headache, and joint pain.