The latest evidence is a study suggesting that the cult British foodstuff could help boost brain power and stave off dementia.

Researchers from York University said the high concentration of Vitamin B12 in the yeast extract increases levels of chemicals in the brain which are thought to protect against neurological disorders. Participants in the study ate a teaspoon of Marmite per day and were found to have increased levels of a neurotransmitter known as GABA, said to calm the brain and soothe the effects of anxiety.

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