recommended concentration for topical ghk-cu Koppā Beauty | TREAT · 2% FULL-FACE — the copper peptide serum. 2% GHK-Cu copper tripeptide, full face, on clean skin first. It is the thinnest ingredient:niacinamide Alpha Flow, Liposomal Glutathione Lot #:Lot #: N9GHKCU50/0328
SKU: 10793068150
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