From APF:
In a world bitterly divided into pro- and anti-Marmite factions, lovers of the tangy British spread have found support from an unexpected quarter: brain science.
Uh oh. Something that tastes bad is good for you? Shocking!
Experiments found that volunteers who ate a daily spoonful of the dark-brown yeast extract seemed to have higher levels of a vital neuron chemical associated with a healthy brain. The reason could lie in Marmite’s high levels of vitamin B12.
I just take extra vitamin B12.