Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health Neurogan GHK Cu Copper Peptide Face Cream 4% Peptides for Skin Firmness & Deep Hydration Daily Facial Moisturizer with 2400 MG GHK Cu 2oz Buy Now with Express International Delivery GoSupps.com LUMINATE is a collagen stimulating peptide serum that combines three fast acting peptides (GHK Cu, Argireline, and Leuphasyl) to help reduce the appearance of wrinkles and promote firmer, healthier What is GHK Cu? GHK Cu is a naturally occurring copper peptide composed of three amino acids bound to copper. It functions as a signaling molecule in the skin, helping to support repair processes,