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 GHK CU Peptide Injection Guide and Benefits TikTok Why Neuvian Skincare Chooses Imidazole Based Molecules Like GHK Cu Ove Are GHK Cu Injections Safe Enough? Alternatives Options Neurogan Health What is a GHK CU Injection? Benefits and Uses Prime IV