GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Seraphime Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule Private Label Ghk Cu Serum Copper Peptide Hair Growth Copper Peptide Serum for Hair Growth Peptide