... Cosmetics Skin Repairing: Collagen is small peptide, can reach the layer under skin, nourish collagen of underskin, increase collagen activation, keep moisture ... and from aging. Hair Nourishing: Hair is made of collagen. Collagen can control the thickness, elasticity and moisture of hair. ... If you want healthy hair, you should have supplement collagen. Collagen can form a thin film on hair surface and ...