GHK Cu Copper Peptide 1 g (Powder, >99% purity) Lrak Technologies This is my third cycle on GHK Cu., My hair is growing. My nails are strong. My skin has improved. , And now Im focusing on those acne scars from my younger days., And honestly? Theyre starting to go GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B So excited about this peptide! GHK Cu serum and scalp solution available Fascinating peptide that helps to prevent and reduce fine lines and wrinkles. Applied topically on the scalp for hair growth.