All About GHK Cu Peptide More Than Just Cosmetic Uses and Benefits #ghk GHK Cu is a naturally occurring peptide in human plasma that declines with age. When used in injections (usually subcutaneous), it can offer various benefits: Skin Rejuvenation and Anti Aging: Do you know what this little blue injection is? It's called GHK Cu aka the Glow Peptide I've always believed in peptides for skincare, but honestly I never thought about 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