When it comes to collagen, it would be surprising if you haven't heard about it before. But some people are still confused; so what is collagen? One of the building blocks of health, this protein can be found throughout the body but is the most abundant in skin, bones, muscles and joints. Thanks to collagen, we're able to move, bend and stretch. Collagen also is behind keeping our hair shiny, skin glow and nails super strong. It seems as if collagen got popular overnight and has been found in so many health foods and skincare items!