Subcutaneous Injection Sites and Instructions for Safe Self Administration The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 7% GHK CU ACCELERANT Platinum Skin Care Ever heard of GHK Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level GHK Cu Peptide: What It Does for Body Composition and Metabolic Health