GHK Cu Peptide Benefits (And a Few Risks) Explained Peptide dosing Synthagen PL NAD+ + GHK Cu One could support cellular energy + longevity the other could support repair, collagen + glow. Both could be the ultimate inside out upgrade. Because looking better is cute NAD+ + GHK Cu One could support cellular energy + longevity the other could support repair, collagen + glow. Both could be the ultimate inside out upgrade. Because looking better is cute NAD+ and GHK Cu aren't interchangeable! They're complementary One restores what's happening beneath the surface: cellular energy, mental clarity, vitality that lasts beyond a caffeine rush. The other rebuilds what you see: GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health