GHK Cu Copper Peptide Benefits, Uses & Safety Intra V While GLP 1 medications help with weight loss and metabolic health, they can sometimes speed up muscle loss, skin thinning, and collagen decline. Thats where GHK Cu comes in., Known as the copper GHK Cu Peptide: Turn Back the Clock Naturally Calibrate Hydration GHK Cu 50mg 10mL Vial: Automatic Refills Celia Health Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply