GHK Cu Hair Growth Spray Strengthen & Revitalize Hair Pure Tides Therapy Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience 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. So excited about this peptide! GHK Cu serum and scalp solution available Fascinating peptide that helps to prevent and reduce fine lines and wrinkles. Applied topically on the scalp for hair growth.