GHK Cu Peptide Puratek Peptides USA 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 Amazon.com: Skin Perfection GHK Cu Copper Peptide Powder 99.7% Pure DIY Copper Peptides Serum for Face and Scalp Cosmetic Grade GHK Cu 1 Gram Creates Up to 100ml for Fuller Hair and Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule GHK Cu 50mg vial