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Those names can be useful shorthand, but they do not tell you enough by themselves
The peptide's four-residue structure makes it one of the smallest bioactive peptides studied in longevity research, and its compact size contributes to favorable pharmacokinetic properties including rapid absorption from subcutaneous injection sites
GHK-Cu regulates structural protein output, improving both quantity and quality in the dermis
A widely cited microarray screen reported that GHK exposure of human fibroblast cultures altered expression of more than 4,000 genes, with pathway analysis identifying TGF-, integrin, and ubiquitin-proteasome signaling as enriched among GHK-responsive transcripts
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