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Researchers have reported that GHK-Cu can shift gene activity tied to collagen, elastin, and glycosaminoglycans, and it can also affect enzymes that chew up collagen in aged skin models
PMID 9779951
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"Did the Mad Hatter have mercury poisoning?"
In topical application, studies use concentrations of 0.01-1% in cream or serum formulations (Pickart et al., BioMed Res Int 2015For subcutaneous injection (research), doses vary depending on the experimental model
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