GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect 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 Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Seraphime Ahk Cu Peptide Hair Before and After TikTok