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 Whitening GHK CU Copper Peptide Serum for All Skin Types Locations and Hours Gold Coast Federal Credit Union How is the GHK CU Peptide Used in Skin Rejuvenation and Anti Aging? Concierge MD LA The Park at West Palm Beach City of West Palm Beach