"Among "salvageable precursors" (i.e., Na, Nam, NR), a lot of focus is on NR these days because apparently it activates the "anti-aging" sirtuin genes at high concentrations too compared to Na and Nam which only activate those "longevity" genes only at small concentrations and deactivate them at higher concentrations."
Comments
Are you sure you get a similar effect? A quick search suggests niacin behaves quite differently.
https://www.quora.com/What-is-the-difference-between-nicotin...
"Among "salvageable precursors" (i.e., Na, Nam, NR), a lot of focus is on NR these days because apparently it activates the "anti-aging" sirtuin genes at high concentrations too compared to Na and Nam which only activate those "longevity" genes only at small concentrations and deactivate them at higher concentrations."
https://www.ncbi.nlm.nih.gov/pubmed/18429699
"Because current data suggest that nicotinamide riboside may be the only vitamin precursor that supports neuronal NAD+ synthesis"