GHK Cu for hair growth does it actually work? Short answer: no. GHK Cu can be great for skin but when it comes to hair growth, the evidence just isn't there. And this Copper Peptides for Hair Loss: How GHK Cu Can Stimulate Hair Growth HapiPatch GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Medically Guided Hair Treatment Rumen Australia GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health