GHK Cu Hair Growth Guide: Protocols & Results for Canadians He didn't expect THIS Hair thinning. Clumps in the shower. Confidence taking a hit Then he tried something most people have NEVER heard of GHK Cu (Copper Peptide) Look at Support hair growth at the follicle level. GHK Cu is a copper peptide naturally produced by the body that plays a role in tissue repair, healing, and hair follicle activity. As levels decline More than hair its cellular support , GHK CU is a well studied copper peptide known for its role in supporting:, Healthier looking hair & scalp environment, Hair that appears thicker, Hair Growth Stages How You Can Increase Anagen Phase of your Hair