It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin in tetrapod vertebrates. Keratin also protects epithelial cells from damage or …

Mar 6, 2025 · Keratin is a popular ingredient in hair care products, such as shampoos, conditioners, and treatments, due to its ability to strengthen and repair damaged hair. It can help restore the hair's …

Dec 15, 2025 · Keratin, fibrous structural protein of hair, nails, horn, hoofs, wool, feathers, and of the epithelial cells in the outermost layers of the skin. Keratin serves important structural and protective …

Nov 3, 2025 · Keratin is a naturally occurring protein within the body that aids in the health of the skin, hair, and nails. It is also used in hair products.

Jul 18, 2025 · Keratin is a fibrous structural protein predominantly found in epithelial cells. It is responsible for forming protective layers on the surface of the skin, hair, nails, and other appendages.

Jun 2, 2025 · Wondering how keratin treatments work? Ahead, experts help us break down the hair-smoothing process and tell us how it really affects your hair.

Sep 24, 2025 · A keratin treatment is a semi-permanent hair straightening method that aims to smooth and straighten frizzy or curly hair, says Ross Kopelman, MD, a board-certified hair surgeon at …

Sep 17, 2018 · Keratin is the type of protein that makes up your hair, skin, and nails. Keratin can also be found in your internal organs and glands. Keratin is a protective protein, less prone to scratching or...

Oct 23, 2020 · Keratin is a protein that helps maintain the structure of hair, nails, skin, and the lining of the internal organs. Certain nutrients support keratin production.

Keratin is any one of the family of tough and insoluble fibrous structural proteins that form the chief, hard, nonmineralized structural component of hair, wool, horns, nails, claws, hooves, and other …