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Compared with many experimental peptides, GHK-Cu has a stronger history of study in skin biology and wound-healing models

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And the term "copper peptides" itself is doing a lot of unearned work, because it lumps together GHK-Cu (the molecule with 50 years of evidence) with AHK-Cu, GHK-NH2, and a range of synthetic copper-binding sequences that have far thinner mechanism data

Let us simply confine ourselves to considering the various remedies which appeared at one time to have come to hand for each of the various ills of scientific knowledge