The general method for making yeast extract for food products such as Vegemite and Marmite on a commercial scale is to add sodium chloride ( salt ) to a suspension of yeast, making the solution hypertonic, which leads to the cells shrivelling up ; this triggers autolysis, in which the yeast self-destructs.

The general method for making yeast extract for food products such as Vegemite and Marmite on a commercial scale is to add salt to a suspension of yeast, making the solution hypertonic, which leads to the cells ' shrivelling up.

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