Keratin: A protein found in the upper layer of the skin, hair, and nails, and in animal horns. From Eye Health Resources Eye Care When You Have Graves' Eye DiseaseFinding the Care You Need for MSWhat to Know About Neuromyelitis Optica Featured Centers Good and Bad Foods for PsoriasisVideo: Getting Personal on Life With MS Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19
