Keratin is the type of protein that makes up yourhair, skin, and nails. Keratin can also be found in your internal organs andglands. Keratin is a protective protein, less prone to scratching or tearingthan other types of cells your body produces.
Keratin can be derived from the feathers, horns, andwool of different animals and used as an ingredient in hair cosmetics. Sincekeratin is the structural building block of your hair, some people believe thatkeratin supplements, products, and treatments can help strengthen your hair andmake it look healthier.