ceratin
/ˈsɛr.ə.tɪn/
noun
- A fibrous protein that is the main structural component of hair, nails, horns, hooves, and the outer layer of skin; also spelled keratin.
- Nail growth depends on the production of ceratin in the nail bed.
- Some shampoos claim to repair damaged ceratin in your hair.
- Hair is made mostly of ceratin, which gives it strength and flexibility.