AHK Cu + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan Neurogan Health GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu: My secret weapon for skin, hair, and healing, I use it two ways topical cream for my face, and subQ injections 3x a week., It boosts collagen, tightens skin, helps hair grow, and even Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare