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how long to see ghk-cu benefits Copper Peptide: Dosage, Before and After Results, and It Works GHK-Cu: The Regenerative Peptide for
Description
As suggested by Dr

Conclusion: Although GHK-Cu and Pal-GHK are effective and relatively skin permeable, their permeability could be successfully increased using permeation enhancement methodologies

Liver Physiol 313, G39G49 (2017)

It also allows for incredible flexibility in dosing
