Clinical research demonstrates that Niagen (nicotinamide riboside, a specialized form of vitamin B3) effectively increases and restores declining blood and tissue levels of NAD+ in the human body. For individuals focused on healthy aging, mitochondrial support, and metabolic wellness, it serves as a scientifically validated precursor. However, whether it is "worth taking" depends on an individual's budget, health goals, and commitment to foundational lifestyle habits like proper nutrition, regular exercise, and restorative sleep, as supplements work best as an adjunct to healthy living.