Keratin is a beloved ingredient in the hair and beauty industry. Many products and professionals promote keratin because it has been known to promote hair growth and strengthen your locks. Keratin treatments as a whole are designed to promote smooth and shiny hair and it is an important protein found in the hair, skin, and nails. Keratin treatments are semi-permanent hair straightening treatments that smooth and add shine to frizzy hair. The process actually entails placing a keratin hair product on hair in order to make your hair look fuller and healthier. It works well on most hair types.