Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density. Minoxidil vs GHK Cu Copper Peptide Which Is Better? Maneup 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 Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum AHK CU + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline