Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care Copper Peptides for Hair Loss: How GHK Cu Can Stimulate Hair Growth HapiPatch GHK Cu (Copper Peptide) has emerged as one of the most promising regenerative peptides for hair restoration due to its ability to stimulate follicular activity, improve scalp circulation, reduce inflammation, and prolong the GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect