What is yeast and how does it become Marmite?

Did you know that yeast is used to make foods like bread and Marmite, but what is yeast and how is it turned into Marmite? Watch this short video to find out.
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Explosive yeast experiment: www.eathappypro...
A history of Marmite: www.eathappypro...
Marmite quiz: www.eathappypro...