GHK CU AMINOSHOPPE Hilda Gonzalez Larkin Community Hospital LinkedIn Locations and Hours Gold Coast Federal Credit Union 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 Loose skin isnt about age alone., Its about collagen signaling., GHK Cu (copper peptide) is known for supporting pathways involved in:, Collagen and elastin production, Skin remodeling and