Brewers Yeast Safety & Breastfeeding

Brewer's yeast comes from a one-celled fungus and is a byproduct of beer making, though it can also be grown as a nutritional supplement. A good source of iron, chromium and selenium, brewer's yeast also contains several B vitamins, though not B-12. Brewer's yeast has a history of use as a galactagogue, which is a food, herb or medication that increases milk supply in nursing mothers.

Mother breastfeeding her child (Image: oksun70/iStock/Getty Images)

Safe for Nursing Women

According to international board certified lactation consultant Anne Smith, writing for, brewer's yeast is one of several galactagogue herbs usually considered safe for breastfeeding mothers. She warns there is no scientific evidence supporting the claims that it will boost breast milk production, but you might notice a modest increase in supply.

Side Effects

Kathleen Huggins, author of "The Nursing Mother's Companion," cautions some babies have experienced fussiness after their mothers took brewer's yeast. states brewer's yeast has few side effects, but advises women with recurrent yeast problems or yeast infections to avoid using the supplement.

Load Comments

Copyright © 2019 Leaf Group Ltd. Use of this web site constitutes acceptance of the LIVESTRONG.COM Terms of Use , Privacy Policy and Copyright Policy . The material appearing on LIVESTRONG.COM is for educational use only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. LIVESTRONG is a registered trademark of the LIVESTRONG Foundation. The LIVESTRONG Foundation and LIVESTRONG.COM do not endorse any of the products or services that are advertised on the web site. Moreover, we do not select every advertiser or advertisement that appears on the web site-many of the advertisements are served by third party advertising companies.