Powerock Pharma GHK CU 50mg GHK CU Cosmetic for Healthy Skin Aging and Wrinkle Support Pure Prescriptions Molecular structure of the tripeptide GHK Cu. In solution lysine Download Scientific Diagram Multi Peptide + Copper Peptides 1% for Wrinkles and Skin Elasticity 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 Thoughts on the colour of this GHK CU 50mg (still in powder form) : r PeptidePathways