The copper peptide trend has gone from creams to injections — ahead of the science

The peptide is supposed to deliver flawless and firm skin, promote wound healing and other anti-aging effects. So what's the evidence behind GHK-Cu?

<img src='https://npr.brightspotcdn.com/dims3/default/strip/false/crop/3600x2700+0+0/resize/3600x2700!/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2Ff8%2Fd4%2F1bcc9d044d2a8dd6955944772e7b%2Fhbarczyk-npr-copperpeptides-final.jpg' alt='undefined'/><p>The peptide is supposed to deliver flawless and firm skin, promote wound healing and other anti-aging effects. So what's the evidence behind GHK-Cu?</p><img src='https://media.npr.org/include/images/tracking/npr-rss-pixel.png?story=nx-s1-5955552' />