A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue ENHANCED EXTENDS PEPTIDE PLATFORM WITH TOPICAL GHK CU, FORMULATED UNDER MEDICAL COMMISSION OVERSIGHT Enhanced Understanding Glutathione Deficiency Invigor Medical Close Blue Copper Peptides Ghk cu Powder Stock Photo 2682985977 Shutterstock GHK cu Powder CAS 49557 75 7 Suppliers, Manufacturers, Factory Wholesale Price Bloom Tech 1% GHK CU solution: is this applied directly on skin or diluted further? : r DIYaesthetics