Are you using Copper GHK+ yet? PDF) GHK, the Human Skin Remodeling Peptide, Induces Anti Cancer Expression of Numerous Caspase, Growth Regulatory, and DNA Repair Genes The form of GHK Cu you use may matter more than the peptide itself. Which form of GHK Cu have you personally tried before and what was the FIRST noticeable change you experienced? Repair Sun Damaged Skin with Vitali's GHK Cu Copper Peptides Vitali Skincare