GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Copper Peptides for Skin: The Science, Benefits, and Best Practices Hubmed The Blue Revolution: Why 1% Pure GHK Cu is the New Standard for Mature Pure & Cimple GHK Cu, a copper peptide, is a naturally occurring peptide made of three amino acids bound to copper that improves collagen production, wound healing, inflammation, and tissue repair. GHK Cu helps with: Organic Copper Peptide Moisturizer Firming & Smoothing All About GHK Cu, the Copper Peptide Reminding Your Skin How to Heal The Editor's Edit