Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Mall of California Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix 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