Fibronectin composes of two pedtides chains, has six functional regions, which are combined with collagen,heparin,fibres and have the biological functions of tissue regeneration and repair. FN can generate skin tissue in all layers of the skin and accelerate the renewal of aged cells in the stratum corneum. Rebuild and improve skin barrier,repair damaged skin, anti-bacterial and anti-inflammation, acne prone skin, reduce acne scars, and repair sunburn.