Natural creation of collagen is the primary reason why younger people have supple skin and healthy, thicker hair. Collagen exists in our skin, hair, and nails. As we get older, the amount of synthetic Collagen goes down. This is the start of sagging skin. Our hair also loses its shine and thickness. At this time, people sometimes start taking Collagen supplements or drinking Collagen drinks. Not only do these help with beauty, but they also relieve joint aches. Collagen injections can also be used to smooth out wrinkles. Supplements and drinks last longer though because they effect the body from the inside rather than from the surface.