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Sarbaziha notes that levels peak in young adulthood before declining, and she outlines how the compound modulates gene expression tied to repair processes in addition to exerting acute effects on oxidative stress

Cell Commun

After reaching 70% confluence, fibroblasts were cultured for 24 h in 1% FBS DMEM and then incubated with either TGF1 10ng/ml (Peprotech, Dollard des Ormeaux, Quebec, Canada), GHK 10 nM (Sigma, Markham, Ontario, Canada) or control media (1% FBS DMEM, penicillin, streptavidin) for a further 48 h

For perspective, that level of efficacy means someone weighing 220 pounds could expect to lose approximately 53 pounds over 48 weeks

FDA panel narrowly backs unapproved peptide drugs favored by RFK Jr

Continue for the full 12-week timeline before concluding the serum isn't working