There is a LOT more to know about collagen, skin, and all that jazz, but even 2 comics back to back about skin care is pushing it for me, as someone of the male gender.

Sparky notes (You’ll get the reference of a reference there later): There are different types of collagen. It does a lot more than just keep our skin from being all droopy. It’s a protein and it can be found all over the place in animals, like the muscle, bone, and more.  As for skin, yes… The skin you see when you look at your arm is dead.  There are probably a few hundred layers of dead skin cells, in fact.