Peptides are short chains of amino acids, which are the basic units that make up proteins in the body. They act as messengers, carrying vital information between cells and triggering specific functions. When applied topically, peptides can penetrate the outer layer of the skin and interact with the cells responsible for collagen, elastin, and other essential proteins’ production. They work by signaling these cells to increase their protein synthesis, thereby boosting collagen and elastin production. This increased synthesis helps to strengthen the skin’s structure, improve elasticity, and promote a more youthful appearance.