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 GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn We've been talking a lot about GHK Cu, but there's always more to learn. Most people think of it as a hair and skin peptide and this is true. But there is What is GHK Cu Collagen and Elastin Support Neurogan Health GHK CU Cream Coastal Wellness MD