Brewer’s yeast is Saccharomyces cerevisiae.
Brewer’s yeast is a useful source of B vitamins and several minerals. Brewer’s yeast has been used to treat diarrhoea caused by Clostridium difﬁcile. A review concluded that it appears successful in many cases, but it is unclear whether it acts as a probiotic or as a source of B vitamins. Because brewer’s yeast contains chromium it has been claimed to help in the control of blood glucose levels. It is also claimed to prevent hypercholesterolaemia. However, there is insufﬁcient evidence for these claims.
Brewer’s yeast should be avoided by patients taking monoamine oxidase inhibitors(see Interactions). It is also best avoided by patients with gout;this is because high concentrations of nucleic acids, which may lead to purine formation.
Pregnancy and breast-feeding
No problems have been reported.
None reported except ﬂatulence.
Monoamine oxidase inhibitors: may provoke hypertensive crisis.
Brewer’s yeast is available in the form of tablets and powder. The dose is not established.
Brewer’s yeast has a suggested value in controlling blood glucose levels, preventing hypercholesterolaemia and controlling diarrhoea caused by Clostridium difﬁcile . Little evidence is available to support its efﬁcacy in all but the last of these conditions.
(extracted from) Dietary Supplements, Third Edition, by Pamela Mason, BSc, MSc, PhD, MRPharmS, published by Pharmaceutical Press, London, 2007