Hair Rescue: Repair is a combination of two potent peptides, GHK Cu and Zn Thymulin. In studies, GHK Cu has been shown to strengthen existing hair by stimulating growth in areas that lack thickness. Zn Thymulin Subcutaneous Injection Sites and Instructions for Safe Self Administration GHK CU Prosperxlabs Hair Rescue: Repair is a combination of two potent peptides, GHK Cu and Zn Thymulin. In studies, GHK Cu has been shown to strengthen existing hair by stimulating growth in areas that lack thickness. Zn Thymulin VitalRenew Peptides for Hair Restoration!! The three main peptides for hair restoration include the following: Thymosin Beta 4 subq injection Zinc Thymulin topical GHK cu topical Injectable GHK Cu: Beginner's Guide to Copper Peptide