Collagen refers to the prime structural protein in the extracellular space in the different connective tissues in the animal bodies. As the prime constituent of the connective tissue, it is the most abundant protein in mammals, forming about 25 to 35 percent of the whole-body protein component.
Collagen has an application in the cosmetic procedures to hide and fill wrinkles as it forms a series of fibers within the skin, which functions like framework. This maintains the elasticity and moisture of the skin like the younger skin.
