NAD+ or GHK Cu which glow are you going for? NAD+ works on a cellular level to boost energy, support mental clarity, and enhance overall vitality from within. GHK Cu is your skin's GHK Cu HGH & Peptides Deus Medical Dr. Patel dives into the science: GHK Cu begins as a threeamino acid fragment of albumin a sequence already found in the human genome. When this fragment becomes dislodged in the body, it binds GHK CU GHK Cu Peptide: Turn Back the Clock Naturally Calibrate Hydration