Cu Peptide Before and After: What to Expect for Skin and Hair Amazon.com: The Youthful Copper Peptide Face Serum Collagen (Formula Same Buffet Plus Copper Peptides) Peptide Serum for Hydration, Anti Aging, Firmness, Skin Elasticity, Copper Elixir 30ML : Beauty & Personal Care 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 Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density.