GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age GHK Cu Copper Peptide Supplement, Promotes Skin Repair, Reduces Wrinkles CTDE PARIVAR What is the recommended dosage of GHK Cu (Glycyl Histidyl Lysine Copper) for topical treatment of acne and skin health on the face? 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 GHK CU 50 mg LIVV