What Are Peptides? Peptide Serums feature a special class of ingredients called peptides - chain amino acids that makeup proteins. In skincare, peptides offer immense benefits because their molecules are small enough to penetrate the skin's top layers where collagen production happens and inflammation occurs. Once absorbed, they tell skin cells to ramp up collagen and elastin production while also limiting inflammatory processes that lead to faster aging. Some common peptides found in skincare include: ● Argireline - Relaxes muscles under the skin to smooth fine lines and wrinkles ● Palmitoyl pentapeptide - Stimulates collagen and elastin production ● Palmitoyl tripeptide - Improves skin hydration and firmness ● Copper peptides - Supports skin healing and collagen renewal