Collagen is found in connective tissue, skin, tendons, bones, and cartilage. It provides structural support to tissues and plays important roles in cellular processes, including: tissue repair ...

Medically reviewed by Melissa Nieves, LND Collagen supplements are often marketed for youthful-looking skin and pain-free ...

You might soon carry a wallet made from dinosaur skin. No, not fossilized—actual leather engineered from T. rex DNA in a lab.