I totally say this tongue-in-cheek but perhaps this is how the zombie apocalypse starts?
https://www.popularmechanics.com/science/health/a36905562/us-military-testing-anti-aging-pill/
I'm still banking on some covid 19 mutation
NAD+ taken orally gets broken down while digested and is not absorbed directly into the cells. So they're probably testing one of the known precursors the body easily converts into NAD+ that does survive digestion and get straight into cells. Either NR, NMN, or another one I'm not familiar with.
They must be trying to keep older experienced troops able to operate in the field longer. Taking NAD+ intravenously or a precursor orally does nothing for younger people. It's rare for it to help middle age people as well unless they have gone through extraordinary long periods of sleep deprivation and high stress. Which combat troops often experience.
If anyone hears they're using NR, let the rest of us know. Only one company in the US has the rights to produce it. Their nasdaq ticker is CDXC.
Disclaimer: I own stock in the company, and I am not qualified to give investing advice.
I figured the vaccines would start TETOWAKIZA.