Overview

Brewer's yeast (Saccharomyces cerevisiae) is a by-product of beer brewing. Supplements containing brewer's yeast often contain non-living yeast, or "postbiotics".

Brewer's yeast is a source of B vitamins and protein. It also contains chromium, which might help the body use insulin better and lower blood sugar levels. Brewer's yeast also seems to increase enzymes in the stomach that could relieve diarrhea and improve the body's defense against viral infections like the flu.

People use brewer's yeast for diabetes, flu, diarrhea, high cholesterol, and other conditions, but there is no good scientific evidence to support these uses.
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