You can supplement B12 quite easily. Eat a B12 tablet once every two days and you should be g2g.

And B12 for after I do a grip of nitrous!

As far as energy drinks go, I generally lean towards red bull or c4 depending on the task. Red Bull has the most magnesium I've seen from an energy drink, so the caffeine isn't as unbearably buzzy. C4 is just better for anything seriously physical though

Monster has as well, looking at the cans I have here, it contains 200-500% of the daily recommended intake per can, varying by type.

I do hope too much B12 isn't problematic