Using together NMN and NR generates a powerful approach to restore NAD+ levels. These dual NAD+ precursors utilize separate absorption mechanisms - NMN functions via the direct transport pathway, while NR utilizes NRK1 NRK2 enzymes. This dual precursor strategy optimizes NAD+ biosynthesis more effectively than individual supplements. Boosted NAD+ levels promote sirtuin activation, PARP enzyme function, and cellular health.