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 GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? GHK Cu Topical Spray Wells Pharmacy Network GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Scalp Solution Empower Pharmacy