Gluten is a protein that occurs naturally in many types of grains, including wheat, rye, and barley. Gluten ingredients include several grains or grain-derived ingredients that are potentially problematic for those diagnosed with the autoimmune disorder known as celiac disease. If you have celiac disease or a sensitivity to gluten, should you avoid cosmetics that contain gluten ingredients? The general advice is no, as gluten ingredients applied topically cannot penetrate skin and affect the small intestine. However, applying gluten products to lips means some amount of ingestion will occur, so you should avoid lip-care or lip color products with gluten ingredients. 
Some people with celiac disease are also allergic to wheat ingredients, including when they’re applied to skin (via skincare) versus consumed as part of their diet. In such cases, it’s advisable to avoid cosmetics with wheat or other gluten ingredients. According to a September 2012 analysis published in the Journal of the Academy of Nutrition and Dietetics, “individuals with celiac disease should not be concerned about products applied to the hair or skin, especially if the individual washes his or her hands after use. Individuals who are concerned about gluten in cosmetics that are applied to the lip or may be ingested should avoid products that contain “wheat,” “barley,” “malt,” “rye,” “oat,” “triticum vulgare,” “hordeum vulgare,” “secale cereale,” and “avena sativa.” 
- Thompson T, Grace T. Gluten in cosmetics: is there a reason for concern? J Acad Nutr Diet. 2012;112(23):1316-23.
hydrolyzed wheat protein
wheat amino acids
wheat germ glycerides
wheat germ oil