Best Glutathione Supplement 4 Recommendations in 2026 GHK Copper Peptide GHK Cu Tripeptide 1 Most people think skincare works at the surface level. But healthy skin function starts much deeper than a temporary glow. GHK Cu is a naturally occurring copper binding tripeptide that is already found 5 Ways to Increase Vitamin C Levels (#4 is Powerful) GHK Cu (Copper Peptide) is a naturally occurring copper complex that decreases significantly as we age. This powerful peptide is known for its ability to upregulate the production of collagen and elastin, making LINK IN BIO GHK Cu is a powerful copper peptide studied for its potential to support skin rejuvenation, wound healing, hair growth, and inflammation regulation, promoting overall skin, cell, and tissue vitality.