Vivix+ Can Help The Simple Scoop on NAD - And Why You Should Care: NAD stands for nicotinamide adenine dinucleotide, a vital coenzyme found in every living cell that is essential for turning food into energy and repairing DNA. Over time, NAD+—the molecule that powers cellular energy and repair—naturally declines, while every day oxidative stress and inflammation continue to damage DNA and cellular function. Every cell in your body is fighting those two forces at the same t