The biochemical composition of yeast reveals a product containing several elements which, when ingested by a living being, contribute to the smooth operation of its organism . This living being can be human, animal and even plant. The latter is the subject of a recent research field. Yeast can therefore not only act as a food supplement , but as a natural fertiliser . Some yeasts thus improve plants' capacity to take nutritive elements from the soil which they use for their growth.
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