Do you know someone who does not want fresh-looking youthful skin and shiny, silky hair? Well, I don’t. If you are someone who wants it then you must have been trying out skin and hair care products and familiar with peptides by now. Peptides, also known as polypeptides, are naturally occurring in the skin, but they’re also included in many skin care products — and for good reason of course. Peptides are amino acids that make up certain proteins needed by the skin. Collagen is made of three polypeptide chains, so adding peptides can stimulate your skin to make collagen. More collagen can lead to firmer, younger-looking skin.