NAD (Nicotinamide adenine dinucleotide) is a coenzyme that occurs naturally in our bodies, where it supports many key biological processes in our cells. NAD levels decline as we age largely because we start producing less of it at the same time we use more of it. Nourishing your body with NAD has been known to give you the boost of energy you need, mental clarity, improve mood, increase concentration, reduce inflammation and also providing an increase in your natural defense against aging and promotes the renewal of the cells in your skin.