Keratin is a fibrous protein found in the outer layer of animal skin, hair, feathers, and nails. In the context of cosmetics, keratin derived from silkworm cocoons, also known as silk protein or silk fibroin, is highly valued for several reasons:
Moisturizing: Silk protein has excellent moisture-binding properties and can help to keep the skin hydrated, soft, and supple.
Nourishing: Silk protein is rich in amino acids, which are the building blocks of proteins. Amino acids help to nourish and strengthen the skin and hair.
Anti-aging: Silk protein contains antioxidants that can help to protect the skin from free radical damage, which can accelerate the aging process.
Texture: Silk protein has a smooth, silky texture that can help to improve the texture and feel of cosmetic products.
Overall, silk protein is a highly versatile and beneficial ingredient for cosmetics, which is why it is so highly valued in the industry.