GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Viral claim says GHK Cu reset nearly 4,000 genes to a younger state and increased collagen production in a preclinical study. This refers to research on GHK Cu, a naturally occurring copper binding peptide that The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Neurogan Health Copper Peptide GHK CU , 120 mcg, 60 Tablets, 0.52 oz (15 g) eBay