By Dr. Jeffrey Shukhman | White Olive You have probably seen it by now. NAD IV infusions at wellness clinics. NMN capsules on longevity podcasts. NR powders being sold next to protein shakes. The marketing is confident. The price tags are significant. And the promises, "more energy, slower aging, better brain function, longer life,"sound exactly like what most people want to hear. So, do NAD supplements actually work? I went through the clinical research carefully so I could