The collagen composition of this product is atelocollagen type I. When injected directly into the skin, the crosslinked collagen will moderately resist the decomposition of protease. The dispersed collagen will form a soft and viscous fibrous structure, which can stay in the implant site to restore the depression and directly replenish the lost collagen for the skin. Let the skin full of firming glossy elasticity, fade melanin whitening, short recovery period does not absorb swelling and immediate effect after surgery.