Copper Peptides for Skin: The Science, Benefits, and Best Practices Hubmed GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Your skin, but smarter. Friday = peptide glow up Meet GHK Cu the peptide everyone's talking about for a reason. This isn't just skincare it's skin regeneration. Think: Smoother texture