How long does reconstituted GHK Cu stay stable? : r Peptidesource New Biotinylated GHK and Related Copper(II) Complex: Antioxidant and Antiglycant Properties In Vitro against Neurodegenerative Disorders What Is GHK Cu? Discovery & Research Honest Peptide How long is everybody running GHK CU for? : r Peptidesource GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline