GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz 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 Does it work? Maneup GHK Cu hair growth serum : r tressless