Here in the UK a single 250ml 'energy drink' gives you 80% of the RDA for B12 (depending on brand), though as with lots of RDA's when you start really digging i

Here in the UK a single 250ml 'energy drink' gives you 80% of the RDA for B12 (depending on brand), though as with lots of RDA's when you start really digging in you find a lot of them are old and possibly dated.