Amazon.com: Neurogan GHK Cu Copper Peptide Hair & Scalp Serum 2400mg, 4% Copper Peptides Fast Absorbing, Water Based Formula for Hair Softness & Shine Cosmetic Dry Scalp Moisturizer Spray, Made in USA : 99% Pure Copper Peptides (ghk cu) Great for DIY 1 Gram Etsy Copper Peptides Serum for Face 2% GHK CU & 4% EGF Seraphime Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 What Is GHK Cu? The Copper Peptide That Rejuvenates Skin Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference