Collagen is the main structural protein in the extracellular space in the various connective tissues in the body. Collagen consists of 18 different amino acids. Proline (25%) and glycine (20%) are the most abundant. Some of those amino acids help create more collagen. When you lose connective tissue, your body builds new collagen to replace it.
One of the most well-known benefits of collagen is its ability to promote glowing, vibrant skin. This essential protein provides elasticity to the skin, helping it to appear more youthful and healthy. But as you get older and collagen production declines, fine lines, loose skin, and dryness can occur.