Peptides for skin care products were originally discovered in pharmaceutical research related to wound healing and collagen matrix repair to heal wounds.  Peptides are naturally occurring sequences of various amino acids, and different amino acids make different peptides. Peptides send out signals when damaged skin is in need of repair or another skin function is required to maintain healthy skin. Peptides play a vital role in activating skin cells to behave like younger cells and help slow down the aging process of the skin.