NAD, Nicotinamide Adenine Dinucleotide, is a fundamental vitamin essential to life as it is a co-enzyme required for the function of over 500 enzymes. Unfortunately, NAD levels declines as we age. Most people in their 30s are already deficient in NAD and the levels continue to decrease over time. Deficient NAD contributes many diseases and health conditions such as chronic fatigue, brain fog, poor sleep, inflammation, arthritis, heart failure, infertility, and almost all age-related diseases. Fortunately, there are efficient ways to bring NAD levels to the optimal range with NAD testing and supplementation with building blocs of NAD.