These occur naturally in your skin, and the stimulate the production of collagen and elastin to help you maintain healthy, plumper looking, more elastic skin. They do this by telling the skin cells how to repair and function. So basically they stimulate collagen and solve skin problems. However, when we age, the amount of peptide in our skin decreases. So, we use serum and creams to help boost our collagen and elastin levels. When we put peptides on our skin, our body thinks that there has been a breakdown of collagen internally, and stimulates the production of collagen. When purchasing a serum or gel with peptides, the smaller the chain of peptides in the product determines the more effective the product is in stimulating collagen. Once you start using a peptide, your skin should look more plum, tighter, brighter and smoother. However, you have to be compliant. It won’t happen overnight.