I would hope one would be in good enough
physical shape to survive without "vitamins" for some time.
BOB will get you from here to there in the SHTF time,
I think calories,in any form,would be sufficient.
Your BOB should contain the equipment needed to
help you gather,scavenge food supplements until you get to your
new "home base".
Sure,if you can stack some chok-o-vitamins bars in your bag
rather than the standard "powerbar",,,cool....
I just dont think its needed... not even for a month,long
as your getting your calories/protein.
Peanutbutter.... the miracle food

(along with dried prunes)