Generally speaking, multivitamins do nothing.
This is known.
The reason they do nothing is that most people have a reasonable diet that hits all the micros. It doesn’t even have to be a stellar diet, or even vaguely “healthy”, per se.
If your diet already includes the micros; then your body just shits or pisses them out. If you have an actual deficiency in something, it’s probably not diet related and more to do with uptake. Either way, that’s a conversation for you and your doctor, not a pill pusher advert
I assumed it was designed to survive some proximity to a nuclear strike. But definitely not a close-hit, or direct strike.
Far enough away and shielded enough that the flash of radiation doesn’t render its occupants immediately dead.