Delczeg Age-Defense is the only skincare formula that contains Epidermal Growth Factors (EGF) oligopeptides necessary for the rejuvenation of your skin by targeting working on the skin's inner cellular and tissue levels.The regulation of collagen is important for our skin to maintain its softness and suppleness.As we age collagen levels and the many biochemical pathways responsible for its production diminish.These are mainly due to intrinsic (from within) and extrinsic effects on our skin (Sunlight UV rays).