Reporting Summary Further information on experimental design is available in the Nature Research Reporting Summary linked to this article
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and MK-677, a Merck drug that is not a peptide but that behaves just like the peptide GHRP-6
Accelerates wound healing for muscles, tendons, and ligaments
GHK-Cu may be scientifically interesting, but medical decisions should be based on diagnosis, evidence strength, safety, regulatory status, and comparison with better-studied options
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