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GHK-Cu topical serum is the ready-to-apply format of glycyl-L-histidyl-L-lysine copper the same tripeptide-copper complex used in decades of published skin research, pre-formulated for direct dermal application rather than reconstitution and injection

Digests were then cleaned-up by SPE and reconstituted as above

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[DOI] [PMC free article] [PubMed] [Google Scholar] Yang H, Wang J, et al