Stacking nicotinamide mononucleotide and nicotinamide riboside creates a comprehensive approach for restoring NAD+ levels. These dual supplements work through distinct cellular mechanisms to optimize mitochondrial function. While nicotinamide mononucleotide employs the Slc12a8 transporter, NR engages alternative conversion routes. This NMN NR combination addresses mitochondrial energy loss while enhancing longevity pathways.