WHY LONGIVA NAD+NMN Suppositories? Biom’s synergistic combination of NMN and pterostilbene is a powerful combination to increase NAD+ levels and to activate anti-aging sirtuin genes. Highly bioavailable Nanoliposomal NMN in suppository gets into systemic circulation for the sustained increase of NAD+ for an extended period. Increased NAD+ levels help with mitochondrial regeneration, cellular repair, better muscle functioning, better brain functions, and proper sleep patterns.