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 Copper Peptide: The Ultimate Peptide For Longevity Subcutaneous Injection Sites and Instructions for Safe Self Administration Subcutaneous Injection Sites and Instructions for Safe Self Administration GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 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: