Every so often, a new supplement gains popularity as the next big thing in beauty. Right now, collagen peptides are making waves and causing a lot of debate in the medical community. Some believe the promises that taking collagen peptide supplements result in youthful skin, shinier hair, and stronger nails, joints, and bones, as well as other benefits. Others believe that’s all hype. But there is some evidence that, although collagen peptides certainly aren’t magic pills, they may reinvigorate collagen production in the body.