Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com PDF) The effect of tripeptide copper complex on human hair growth in vitro Most people are looking for one miracle solution for hair. But biology doesn't work like that. GHK Copper improves the quality of your scalp, with better collagen, better healing, and healthier tissue. AHK CU + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan