... GM-1129 About Product HOW IT WORKS?98 % of the skin is made up of collagen. The elder we are, the less oxygen ... can not carry out normally.On the theory of skin renew, the physical condition of the skin will be remolded by the biological effect ... the anaerobic bacteria,meanwhile, moisture, oxygen ,and other nutrients of the skin can be supplied, collagen regeneration and rearrangement are also prompted ...