GHK Cu Simon's Compounding One of my personal favorite peptides: GHK Cu (Copper Peptide) I've been using this one consistently and I absolutely love what it does for skin health, healing, and overall cellular repair. GHK Cu is Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Amazon.com: Copper Peptides Serum for Face, 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum), Niacinamide, Ceramides, Squalane & Hyaluronic Acid, Multi Peptide, Collagen Peptide Complex, 1 fl oz : Beauty Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health 2% GHK CU Multi peptide Serum, Anti aging, Hydrating, Collagen Boosting +EGF + Matrixyl 3000 + Argireline + Marine Collagen Etsy Australia