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 The House Kitchen & Bar + The Cabana West Palm Beach Restaurants PHOTOS: Gil Hanse designed West Palm Golf Park to open to public Locations and Hours Gold Coast Federal Credit Union A Major Shift in Peptide Regulation Is Underway