Collagen FXCollagen is one of the most abundant proteins in the body. In fact, collagen is the main protein that forms the connective tissue throughout our body, from skin to bones, muscles, tendons and ligaments. Features Collagen makes up almost 80% of our skin cells and works with another protein called elastin that keeps our skin elastic. But as we age, our bodies naturally start reducing its collagen production. Essentially, our bodies are not able to