Dr Tahera explains that the topical version of GHK Cu and how it supports skin repair and rejuvenation., This is the cream based approach., Injectables? Well cover that next., Because understanding Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix Amazon.com : Copper Peptides for Hair Growth Ultrastrong 10% Copper Peptide Serum for Hair Liposomal 7x Absorption MADE IN USA : Beauty & Personal Care Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz