Combining NMN and NR creates a comprehensive approach to increase NAD+ levels. These complementary longevity supplements work through distinct mechanisms in NAD+ biosynthesis, with nicotinamide riboside utilizing NRK1 NRK2 enzymes while nicotinamide mononucleotide bypasses this conversion step. This dual approach enhances NAD+ coenzyme availability for sirtuin activation, cellular energy, and genomic maintenance.