GHK Cu Side Effects, Complications, and Risk Profile 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 Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Peptides are garnering increasing attention in the fields of skincare and healthparticularly copper peptides such as GHK Cu, which are renowned for their ability to promote collagen synthesis,