Yeast extract

Water-soluble product obtained by breaking open yeast cells, mainly Saccharomyces cerevisiae.

Characteristics

Rich in free amino acids, peptides and nucleotides.
Contains B vitamins such as niacin, biotin and pantothenic acid.
Supplies minerals: potassium, phosphorus, magnesium and zinc.
Widely used as a nutrient medium for microbial fermentation.

Role in the preparation: Supplies nitrogen, vitamins and growth factors to the microorganisms in fermented preparations.

Caution: Keep in a dry, tightly closed container because the powder absorbs moisture, and check local regulations before any use.

Sources: PMC - Yeast extract: production, composition and applications (review)

Documentary information: this is neither a recommendation for use nor a plant-protection or veterinary claim. Check your country's regulations before any use.