Saccharomyces Boulardii

What other names is Saccharomyces Boulardii known by?

Brewer's Yeast (Hansen CBS 5926), Hansen CBS 5926, Levure de Boulangerie (Hansen CBS 5926), Probiotic, Probiotique, Saccharomyces, Saccharomyces boulardii, Saccharomyces Cerevisiae, S. Boulardii.

What is Saccharomyces Boulardii?

Saccharomyces boulardii is a yeast, which is a type of fungus. Saccharomyces boulardii was previously identified as a unique species of yeast, but is now believed to be a strain of Saccharomyces cerevisiae (baker's yeast). Saccharomyces boulardii is used as medicine.

Saccharomyces boulardii is used for treating and preventing diarrhea, including infectious types such as rotaviral diarrhea in children, diarrhea caused by gastrointestinal (GI) take-over (overgrowth) by "bad" bacteria in adults, traveler's diarrhea, and diarrhea associated with tube feedings. It is also used to prevent and treat diarrhea caused by the use of antibiotics.

Saccharomyces boulardii is also used for general digestion problems, irritable bowel syndrome (IBS), inflammatory bowel syndrome (IBD, Crohn's disease, ulcerative colitis), Lyme disease, a bowel disorder called relapsing Clostridium difficile colitis, and bacterial overgrowth in short bowel syndrome.

Some people use Saccharomyces boulardii for lactose intolerance, urinary tract infections (UTIs), vaginal yeast infections, high cholesterol levels, hives, fever blisters, canker sores, and teen-age acne.

Likely Effective for...

  • Diarrhea associated with antibiotics. Most research shows that taking Saccharomyces boulardii can prevent diarrhea caused by taking antibiotics.
  • Diarrhea. Most research shows that Saccharomyces boulardii can prevent diarrhea in people with feeding tubes. It also appears to help treat diarrhea in infants and children.

Possibly Effective for...

  • Acne. Some research suggests that taking a type of Saccharomyces boulardii (Perenterol, Cell Tech Phama) by mouth can improve the appearance of acne.
  • Diarrhea caused by the bacteria Clostridium difficile. Taking Saccharomyces boulardii by mouth along with the antibiotics vancomycin or metronidazole prevents the recurrence of diarrhea caused by the bacteria Clostridium difficile. However, it might not help treat first episodes of diarrhea caused by this type of bacteria.
  • Helicobacter pylori. Some evidence suggests that taking Saccharomyces boulardii reduces the side effects of treatment for ulcers caused by the bacteria Helicobacter pylori.
  • Diarrhea related to HIV. Taking Saccharomyces boulardii by mouth appears to reduce diarrhea related to HIV.
  • Traveler's diarrhea. Taking Saccharomyces boulardii by mouth appears to prevent traveler's diarrhea.

Insufficient Evidence to Rate Effectiveness for...

  • Amoeba infections (amebiasis). Early research shows that taking Saccharomyces boulardii by mouth along with antibiotics reduces diarrhea and stomach pain in people with amoeba infections.
  • Crohn's disease. Early research shows that Saccharomyces boulardii combined with mesalamine can help people with Crohn's disease stay in remission longer. Remission is a period of time during which symptoms of disease are controlled. Taking Saccharomyces boulardii also seems to reduce the number of bowel movements in people with Crohn's disease.
  • Cystic fibrosis. Early research shows that taking Saccharomyces boulardii by mouth does not seem to reduce yeast infections in the digestive tract of people with cystic fibrosis.
  • Irritable bowel syndrome (IBS). Early research suggests that taking Saccharomyces boulardii by mouth might improve bowel movements, stomach pain, bloating, and upset stomach in people with IBS.
  • Ulcerative colitis. Early research shows that adding Saccharomyces boulardii to standard mesalamine therapy can reduce symptoms in people with mild-to-moderate ulcerative colitis.
  • Urinary tract infections (UTIs).
  • Yeast infections.
  • High cholesterol.
  • Lyme disease.
  • Hives.
  • Fever blisters.
  • Canker sores.
  • Lactose intolerance.
  • Other conditions.
More evidence is needed to rate Saccharomyces boulardii for these uses.

Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).


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