GHK Cu Peptide Serum 30g Planet Beauty GHK Copper Peptide GHK Cu Tripeptide 1 Old stretch marks and loose skin after weightloss : r Microneedling 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? Microneedling with GHK Cu is one of the most effective ways to stimulate collagen where your skin needs it most. The reason is simple: it's targeted. Microneedling creates micro injuries on the skin, and GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness