Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density. Viral claim says GHK Cu reset nearly 4,000 genes to a younger state and increased collagen production in a preclinical study. This refers to research on GHK Cu, a naturally occurring copper binding peptide that Hair Growth Serum Intense with Copper Peptide GHK Cu