It is a very common misconception that only those with allergies or sensitive skin should be using non-toxic makeup products, but the reality is that those products are great for a variety/all of skin types. Also, lipstick, lip-gloss, mouthwash, toothpaste—they can all trigger a reaction in people with celiac disease," says Alice Bast, founder and president of the National Foundation for Celiac Awareness (NFCA). If you're sensitive to gluten, you should be using gluten-free cosmetics and toiletries.