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 GHK CU Copper Peptide SARMs Supplements 99% Pure Copper Peptides (ghk cu) Great for DIY 1 Gram Etsy BPC 157+GHK Cu Face Serum Skin Repair & Hydration Pure Tides Therapy Ghk Cu Copper Peptide Powder Etsy