Not all Copper Peptides are created equal If you've tried copper peptides before and saw no change, here is why: Concentration and Stability. Most serums use a diluted solution that barely scratches Skincare Copper Peptide GHk Cu & Methylene Blue Global Ubuy Skin Perfection Ghk Cu Copper Peptide Powder 99.7% Pure Diy Ghk Powder to Make a Serum for Face Hair Scalp 1g NEW. Blue Copper Multi Peptide 8.0 Advanced reformulated for smarter skin renewal. #GRAVICH #SmartSkinRealResults GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) GHK Cu Peptide Before and After Results