Small but mighty—150mg is our lowest starter serving for daily NAD+ support. Take two capsules for your daily serving of 300mg, or stack for an extra NAD+ boost when you need more. 300mg is clinically proven to increase NAD+ levels by over 50%. Niagen®, our award-winning NAD+ precursor supports cellular function, cellular energy production, and cellular repair. Tru Niagen is one of the most well-researched supplements available. Strengthen your cells' resilience against daily stressors and the natural aging process. Increased NAD+ levels helps optimize heart, brain, muscle, and whole-body health for enhanced vitality and healthy aging.