“Celiac disease is a chronic digestive and immune disorder that damages the small intestine. The disease is triggered by eating foods containing gluten. Gluten is a protein found naturally in wheat, barley, and rye, and is common in foods such as bread, pasta, cookies, and cakes. Many products contain gluten, such as prepackaged foods, lip balms and lipsticks, toothpastes, vitamin and nutrient supplements, and, rarely, medicines.

Celiac disease can be serious. The disease can cause long-lasting digestive problems and keep your body from getting all the nutrients it needs. Celiac disease can also affect the body outside the small intestine.”

NIH National Institute of Diabetes and Digestive and Kidney Diseases