For those that like or love the taste, the spread’s only downside is its high salt content. Made from leftover brewer’s yeast, Marmite contains boosting levels of the B vitamins thiamin, riboflavin and niacin, which nourish the nervous system and help the body to release energy from food.

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Folic acid and vitamin B12 help to make red blood cells. A 2017 study at the University of York found that Marmite’s B vitamins may increase levels of a brain-calming neurotransmitter. Marmite is also rich in magnesium, which has a raft of functions in the body and may improve sleep quality. So, eating marmite could actually help ease anxiety and depression.

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Asked by: Tim Stephens, via email

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Authors

Dr Emma Davies is a science writer and editor with a PhD in food chemistry from the University of Leeds. She writes about all aspects of chemistry, from food and the environment to toxicology and regulatory science.

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