Synthetic creation of collagen is the main reason why younger people boast 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 point, men and women can start taking Collagen supplements or drinking Collagen drinks. Not only do these help with beauty, but they also help joint aches. Collagen injections can also be used to smooth out wrinkles. Supplements and drinks last longer though because they treat the body from the inside rather than from the surface.