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 natural shine, reduce breakage, and provide heat protection.

Keratin (/ ˈkɛrətɪn / [1][2]) is one of a family of structural fibrous proteins also known as scleroproteins. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin in vertebrates. Keratin also protects epithelial cells from damage or stress.

Keratin products and treatments can help strengthen your hair and make it look brighter and feel softer. You can help your body produce keratin by eating keratin-rich foods. What is keratin? Keratin is a protein that helps form hair, nails and your skin’s outer layer (epidermis).

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.

Oct 6, 2023 · Keratin is a protein in the cells on the surface of the skin. The fingernails, hair, and skin need keratin to grow, function, and stay healthy. Cosmetic treatments to improve hair and nail health are often enriched with keratin. Keratin also occurs naturally in some foods and can be taken in supplement form as well.

Apr 5, 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 functions, particularly in the epithelium.

Sep 17, 2018 · Keratin is a protective protein, less prone to scratching or tearing than other types of cells your body produces. Keratin can be derived from the feathers, horns, and wool of different animals...

The keratins are the typical intermediate filament proteins of epithelia, showing an outstanding degree of molecular diversity. Heteropolymeric filaments are formed by pairing of type I and type II molecules. In humans 54 functional keratin genes ...

Jul 17, 2024 · “Keratin is a structural and protective protein that makes up hair and nails,” says cosmetic biochemist Stacey Steinmetz. “In hair, it’s responsible for preventing breakage, frizz, and heat damage. By applying keratin topically to your hair, it can be used to smooth and de-frizz.”

Aug 17, 2020 · Keratin supplements are often said to help prevent hair loss, increase nail growth, and improve skin texture. Yet, plenty of healthy foods may naturally support your body’s synthesis of keratin.