NAD+ works on a cellular level to give our bodies energy and the tools to obtain optimal health. As we age, our bodies naturally produce less and less NAD+. If we do not take in the right nutrients in the right amounts, our bodies fail to produce sufficient NAD+. Insufficient NAD+ (whatever the cause) causes deficiencies and suboptimal functioning across our internal organs. Regularly adding NAD+ is a practice growing in popularity among both biohackers and the chronically ill.