Keratin

ingredientAnimal-derivedSource: Various animals

A structural protein extracted from animal hair, feathers, horns or hooves.

Common in hair-smoothing treatments and shampoos.

Also known as

Common aliases you may spot on a label. Add these to your ingredient blocklist.

Hydrolyzed keratin

Lower-impact substitutes that formulators reach for when replacing keratin.

Soy proteinWheat proteinBamboo extract

A red pigment made from crushed cochineal insects, used in cosmetics, food and drinks.

A waxy secretion extracted from sheep wool, used in lip balms, creams and industrial products.

Rendered animal fat, common in soap bars, moisturizers and candles.

A protein obtained by boiling animal skin, bones and connective tissue.

Wax produced by honey bees, used in balms, mascaras and polishes.

A resin secreted by the lac bug, used in nail polishes, hair sprays and food glazes.