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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 Topical Serum: Benefits, Mechanism & Research Guide AHK Cu Copper Peptide Hair Growth Study (2007) Plain Language Summary Hairgenetix GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration PMC

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