Dimeric copper peptide incorporated hydrogel for promoting diabetic wound healing Nature Communications GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu is a naturally occurring copper peptide known for its powerful role in skin repair, hair health, and cellular regeneration. Key Benefits: 1.Boosts Collagen & Elastin Helps improve skin firmness and elasticity. GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or