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 Natural Copper Peptide Serum Booster 7% GHK Cu Cosmetic Ingredient Accelerant Skin Biology 15 ml Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with 7% GHK Cu Accelerant for Cosmetics The Original Copper Peptide for Anti Aging DIY Ingredient to Boost Anti Wrinkle Skin Care Buy or Shop Skin Biology True Copper Peptides