Keratin is a structural protein found in human skin, hair, and nails. It plays a crucial role in maintaining the strength and integrity of these tissues. Research in the field of keratin aims to understand its biological functions, structure, and interactions with other molecules. This research also explores how keratin abnormalities can lead to various skin and hair disorders, as well as potential therapeutic interventions to treat these conditions. Additionally, keratin research may also have applications in tissue engineering and regenerative medicine.