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 GHK Cu for Skin & Wound Healing: Current Evidence Meeting Point Health How Copper Peptides Block DHT to Prevent Hair Thinning and Loss HapiPatch The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget