AHK CU + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan Small molecules. Powerful results. Experience Peptide Power with Hairgenetix's advanced Copper Peptide Hair Growth Serum, formulated with 10% GHK Cu and 5% AHK Cu to support hair health at the follicle level. Helps 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 GHK Cu Copper Tripeptide Hair Serum: DHT Blocker, Fuller Looking Hair Soon as 7 9 Weeks 1oz Etsy