GHK Cu 50mg vs 100mg: Which Concentration Should You Buy? GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu One of our favorite peptides! Have YOU tried it?, ., ., BENEFITS:, Hair: Encourages stronger growth, reduces shedding, and helps restore thickness and vitality., Skin: Boosts collagen and 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