De Novo NAD+ Exercise-Response Test for Supplement Brands

A research-use testing service that measures how much a person's quinolinic acid (the direct de novo NAD+ precursor) and KAT4 expression rise after a standardized endurance session, giving NAD+ supplement brands a dynamic, exercise-anchored human endpoint for the tryptophan-to-NAD+ route that static NAD+ blood tests cannot show.