Is Brewer's Yeast safe while breastfeeding?
Here is what NIH LactMed, the U.S. National Library of Medicine's authority on medicines and breastfeeding, reports about Brewer's Yeast. This is a summary of that source — not our own verdict.
Effects on the breastfed infant
In a survey of 108 nursing mothers in South Africa, one woman reported cramps in her infant after she used brewer's yeast as a galactogogue.[ 3 ]
Effects on milk supply
In a survey of nursing mothers in Australia, 592 mothers were taking brewer's yeast as a galactogogue. On average, mothers rated brewer's yeast as slightly less than moderately effective on a Likert scale. Sixty-five mothers (11%) taking brewer's yeast reported experiencing an adverse reaction, most commonly weight gain, stomach cramps, dry mouth and nausea. Twelve (2%) reported having more than one adverse effect.[ 4 ]
Levels in milk
Maternal Levels. Relevant published information was not found as of the revision date. Infant Levels. Relevant published information was not found as of the revision date.
Source: NIH LactMed (National Library of Medicine).
Educational summary of an authoritative source — not medical advice. Never start, stop, or change a medicine while breastfeeding without confirming with your doctor.