KLOW Peptide Blend Research Vial BPC 157 GHK Cu TB 500 KPV LiveWell Research Peptides vs. Pharmacy Compounded Peptides: What's the Real Difference? Renew Vitality Advanced GHK Cu Neck & Face Serum Premium Quality 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 Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb One of my patients has shared this picture with me as she felt it was odd that this peptide had this very vivid blue colour, while her other peptides had a clear