GHK Cu Hair Growth Spray Strengthen & Revitalize Hair Pure Tides Therapy Cellular Glow Hair Serum 10% GHK Cu + 5% AHK Cu Peptides Copper Peptide Set Complete Hair Growth Treatment (Shampoo, Conditioner & Serum) Skinworks GHK Cu peptides are used to potentially promote hair growth, increase hair follicle size, and improve scalp health, often for conditions like androgenetic alopecia. As a regenerative peptide, GHK Cu is GHK Cu Peptide Progress: Week 3 Results