Collagen is the protein responsible for skin elasticity. It also plays a role in joint and bone health. Human bodies create collagen naturally. Over time, however, the production of this protein slows down. As a result, a person’s skin begins to lose some of its ability to bounce back into shape, a process that many call “elasticity.” As this occurs, wrinkles begin to form. Although certain foods, such as bone broth, contain collagen, people who want wrinkle-free skin or other health benefits often look to supplements to increase their collagen intake.