NADH (Reduced Nicotinamide Adenine Dinucleotide) is the active coenzyme form of vitamin B3, important for boosting cellular energy & mental clarity. As NAD levels decline with age—dropping nearly 50% by age 60—taking NADH supplements starting at 30 can support sustained energy and cognitive function as you age. With 20mg in each vegetarian tablet, NADH helps generate energy & can even boost your overall brain performance.