USA Copper Peptide GHK Cu Powder, DIY Blue Copper for Making the Best Face Cream eBay Amazon.com: GHK Cu Copper Peptide Powder 99.7%+ Pure Cosmetic Grade Ingredient for DIY Serums, Creams & Scalp Tonics Supports Collagen & Fuller Hair (1g) : Beauty & Personal Care Buy GHK Cu Powder Peptides (100MG) 99% Pure RUO Peptides 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 Amazon.com : blloocod GHK Cu Copper Peptide Powder, CAS 49557 75 7, Purity 99+%, 7 Gram : Health & Household