A blend of amino acids from wheat protein after it has been broken down via hydrolysis. Most often used in hair-care products as a conditioning agent, but also found in skincare products where it likely has hydrating ability. There is limited research showing that wheat amino acids can penetrate the hair shaft; however, most likely the smaller molecular size of the amino acids can penetrate hair better than whole protein sources.
Reference for this information:
International Journal of Cosmetic Science, October 1997, pages 215–226