Introduction

Brewer’s yeast is a by-product made when brewing beer. It has been used to aid digestion. It can be taken as a pill or powder.

Dosages

500 milligrams 1 to 2 times daily.

What Research Shows

Likely Effective

May Be Effective

  • Allergic rhinitis—may reduce nasal congestionA1
  • Cold/flu-like symptoms —may reduce the incidence of these symptomsB1, B2

Not Enough Data to Assess

  • Premenstrual syndrome D1

Editorial process and description of evidence categories can be found at EBSCO NAT Editorial Process.

Editorial process and description of evidence categories can be found at EBSCO NAT Editorial Process.

Safety Notes

It is likely safe for most adults to take brewer’s yeast for a short time. People sensitive or allergic to yeast may have reactions to brewer’s yeast. Not enough studies have been done to say whether it is safe to take for a long period. It is also not known whether it is safe to take by women who are pregnant or breastfeeding.

Interactions

Talk to your doctor about any alternative therapy or supplements you are taking to make sure they do not interfere with your current treatment.

  • People with Crohn’s disease or weakened immune systems from other diseases or treatments should talk to their doctors before taking brewer’s yeast.E1, E2

Revision Information