What NAD+ actually does.
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every cell, central to energy metabolism and DNA repair. Levels decline meaningfully with age. IV NAD+ replenishes the systemic pool — bypassing the gut, where oral precursors are limited.
The published evidence is most consistent for cognitive clarity, energy and recovery in adults experiencing age-related decline. We won't oversell it beyond that.