Copper peptides are everywhere in serums, scalp treatments, and influencer recommendations. But does the science actually support the hype? The answer: yes, with nuance. GHK Cu is a naturally occurring tripeptide found Longevity: Functional Medicine for Optimal Health and Wellness Viral claim says GHK Cu reset nearly 4,000 genes to a younger state and increased collagen production in a preclinical study. This refers to research on GHK Cu, a naturally occurring copper binding peptide that GHK Cu Copper Peptide Benefits, Uses & Safety Intra V Bioactive peptides for boosting stem cell culture platform: Methods and applications ScienceDirect