Last update Feb. 3, 2022

Saccharomyces cerevisiae; Saccharomyces Siccum

Very Low Risk

Safe. Compatible. Minimal risk for breastfeeding and infant.

Unicellular fungus used to produce beer, bread and wine by fermentation. Contains amino acids, sugar, fat, Vitamin B and mineral salts. The Commission E of the German Ministry of Health recommends it for anorexia, asthenia and chronic acne.(Blumenthal 1998)

Since the last update we have not found published data on its excretion in breastmilk.

The passage of the fungus into breast milk is highly unlikely, since it is destroyed by digestion in the intestine. The administration of probiotics and other live organisms is contraindicated in immunocompromised persons. (Poncelet 2021) 

The consumption of non-alcoholic beer appears to enhance the antioxidant capacity of breastmilk and decrease oxidative damage in breastfeeding mothers. (Codoñer 2013)

Nursing mothers have had mild gastrointestinal side effects with the consumption of brewer's yeast. (McBride 2021)

It seems to be a good nutritional supplement. Brewer's yeast has been advocated as a galactogogue (Muresan 2011). A barley component of beer (even nonalcoholic beer) can also increase prolactin secretion. (ABM 2018), however proof on effectiveness as a galactagogue is lacking. (Jia 2021, Koletzko 2000, Mennella 1993,)

The best galactógogo is the maternal self-confidence along with a breastfeeding on demand using a correct technique for nursing. (ABM 2018 y 2011, Mannion 2012, Forinash 2012)

There is a reduced intake of breast milk by infants after even moderate consumption of alcohol (alcoholic beer) by their mothers. (Koletzko 2000, Mennella 1993)

See below the information of these related products:

  • Alcohol (alcoholic beverage) ( Poorly safe. Evaluate carefully. Use safer alternative or interrupt breastfeeding 3 to 7 T ½ (elimination half-lives). Read the Comment.)
  • Probiotics (Possibly safe. Probably compatible. Mild risk possible. Follow up recommended. Read the Comment.)
  • Saccharomyces boulardii ( Safe. Compatible. Minimal risk for breastfeeding and infant.)

Suggestions made at e-lactancia are done by APILAM team of health professionals, and are based on updated scientific publications. It is not intended to replace the relationship you have with your doctor but to compound it. The pharmaceutical industry contraindicates breastfeeding, mistakenly and without scientific reasons, in most of the drug data sheets.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

Saccharomyces cerevisiae; Saccharomyces Siccum is Brewer´s Yeast in Latin, another name.

Is written in other languages:

Saccharomyces cerevisiae; Saccharomyces Siccum is also known as


Saccharomyces cerevisiae; Saccharomyces Siccum belongs to this group or family:


Main tradenames from several countries containing Saccharomyces cerevisiae; Saccharomyces Siccum in its composition:


  1. McBride GM, Stevenson R, Zizzo G, Rumbold AR, Amir LH, Keir AK, Grzeskowiak LE. Use and experiences of galactagogues while breastfeeding among Australian women. PLoS One. 2021 Jul 1;16(7):e0254049. Abstract Full text (link to original source)
  2. Jia LL, Brough L, Weber JL. Saccharomyces cerevisiae Yeast-Based Supplementation as a Galactagogue in Breastfeeding Women? A Review of Evidence from Animal and Human Studies. Nutrients. 2021 Feb 25;13(3). pii: 727. Abstract
  3. Poncelet A, Ruelle L, Konopnicki D, Miendje Deyi VY, Dauby N. Saccharomyces cerevisiae fungemia: Risk factors, outcome and links with S. boulardii-containing probiotic administration. Infect Dis Now. 2021 May;51(3):293-295. Abstract
  4. ABM: Brodribb W. ABM Clinical Protocol #9: Use of Galactogogues in Initiating or Augmenting Maternal Milk Production, Second Revision 2018. Breastfeed Med. 2018 Jun;13(5):307-314 Abstract Full text (link to original source) Full text (in our servers)
  5. Codoñer-Franch P, Hernández-Aguilar MT, Navarro-Ruiz A, López-Jaén AB, Borja-Herrero C, Valls-Bellés V. Diet supplementation during early lactation with non-alcoholic beer increases the antioxidant properties of breastmilk and decreases the oxidative damage in breastfeeding mothers. Breastfeed Med. 2013 Abstract
  6. Forinash AB, Yancey AM, Barnes KN, Myles TD. The use of galactogogues in the breastfeeding mother. Ann Pharmacother. 2012 Oct;46(10):1392-404. Abstract
  7. Mannion C, Mansell D. Breastfeeding self-efficacy and the use of prescription medication: a pilot study. Obstet Gynecol Int. 2012;2012:562704. Abstract Full text (link to original source) Full text (in our servers)
  8. Muresan M. Successful relactation--a case history. Breastfeed Med. 2011 Abstract
  9. ABM. Academy Of Breastfeeding Medicine Protocol Committee. ABM Clinical Protocol #9: Use of galactogogues in initiating or augmenting the rate of maternal milk secretion (First Revision January 2011). Breastfeed Med. 2011 Abstract Full text (link to original source) Full text (in our servers)
  10. ABM. Comité de Protocolos de la Academia Médica de Lactancia Materna. ABM Protocolo Clínico #9: Uso de Galactogogos para Iniciar o aumentar la tasa de secreción de Leche Materna. Breastfeed Med. 2011 Full text (link to original source) Full text (in our servers)
  11. Koletzko B, Lehner F. Beer and breastfeeding. Adv Exp Med Biol. 2000 Abstract
  12. Blumenthal M, Busse WR, Goldberg A, Gruenwald J, Hall T, Riggins CW, Rister RS, editors. The American Botanical Council. The Complete German Commission E Monographs. Therapeutic Guide to Herbal Medicines. 1st ed. Integrative Medicine Com; Boston, MA, USA: 1998
  13. Mennella JA, Beauchamp GK. Beer, breast feeding, and folklore. Dev Psychobiol. 1993 Abstract Full text (link to original source) Full text (in our servers)

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