GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia GHK Cu Hair Growth GHK CU 100 mg Core Aminos Research Glowyour way. Meet GHK Cu, our glow enhancing copper peptidenow available in both a luxe topical cream and an injectable option, personalized to how you want to elevate your results. This is the Same GHK Cu. Better way. Same GHK Cu copper peptide complex. Completely different experience. If you've been eyeing the pen, put it down. We made something better, and your skin barrier will thank you