Question

.w.h.a.t.

.i.s.

k.e.r.a.t.i.n.​

Answer 1

Answer:

Keratin is the type of protein that makes up your hair, skin, and nails. Since keratin is the structural building block of your hair, some people believe that keratin supplements, products, and treatments can help strengthen your hair and make it look healthier.Keratin is one of a family of fibrous structural proteins known as scleroproteins. α-Keratin is a type of keratin found in vertebrates. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, calluses, and the outer layer of skin among vertebrates.