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 GHK Copper (GHKCu) is a naturally occurring tripeptide that acts as a potent signaling molecule for hair regeneration., How it works: GHK Cu enhances hair follicle health by promoting angiogenesis and GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Copper Tripeptide For Thinning Hair Regrow Serum Essence Oil DHT Blo Collagen Tripeptides Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz