GHK-Cu stimulates hair follicle growth and enlarges hair follicle size, while TB-500 promotes angiogenesis to improve scalp blood flow. Some users add Thymosin Beta-4 for additional follicle support. Studies in
International Journal of Molecular Sciences show GHK-Cu increases hair growth by activating follicle stem cells and extending the anagen phase, with enhanced results when vascular support is optimized.