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 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 Smoking drinking on GHK Cu #reels #peptides #peptide #peptalk #education GHK Cu Peptide Before and After Results The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline BodyPharm GHK Cu My Antidote