The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline About 50% of people will say it's a miracle while the other 50% will say it's useless. Read these papers yourself and find out where you stand. The first order degradation profiles of GHK Cu in various medium stored Download Scientific Diagram 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 Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms GHK Cu Peptide: What It Does for Body Composition and Metabolic Health