What are the recommended topical dosing, usage guidelines, and contraindications for copper peptide (GHKCu) preparations in adults? GHK Copper Peptide Concentrate, cumpr ingredient cosmetic A year ago I started working with a copper peptide called GHK Cu. Topically every night. And under my doctor's care, I went deeper than topicals with a low dose. The difference in GHK Cu Peptide Skin Cream Levers.Health
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