"Friendly" organisms such as S. boulardii can help fight off "bad" organisms that might cause diseases. S. boulardii is different from other strains of S. cerevisiae, commonly known as brewer's yeast and baker's yeast.
People commonly use S. boulardii for treating and preventing diarrhea, including rotaviral diarrhea in children. It's also used for other types of diarrhea, acne, a digestive tract infection that can lead to ulcers, and many other conditions, but there is no good scientific evidence to support many of its other uses. There is also no good evidence to support using S. boulardii for COVID-19.
Don't confuse S. boulardii with other probiotics, or with fermented food products such as fermented milk, kefir, or yogurt. These are not the same.
Uses & Effectiveness
Likely Effective for
- Diarrhea. Taking S. boulardii by mouth can reduce how long diarrhea lasts in children. It's not clear if it helps children with longer-lasting diarrhea or if it helps adults.
Possibly Effective for
- Diarrhea in people taking antibiotics (antibiotic-associated diarrhea). Taking S. boulardii by mouth can help prevent diarrhea in adults and children being treated with antibiotics.
- Infection of the gastrointestinal tract by bacteria called Clostridioides difficile. Taking S. boulardii by mouth seems to help prevent diarrhea from C. difficile infection. Taking it along with antibiotics also seems to help prevent this infection from coming back.
- A digestive tract infection that can lead to ulcers (Helicobacter pylori or H. pylori). Taking S. boulardii by mouth along with standard H. pylori treatment helps prevent side effects such as diarrhea and nausea that occur with standard H. pylori treatment. But it isn't clear if taking S. boulardii helps these standard treatments to work better.
- A serious intestinal disease in premature infants (necrotizing enterocolitis or NEC). Most research shows that giving S. boulardii by mouth to preterm infants prevents NEC.
- Diarrhea caused by rotavirus. Taking S. boulardii by mouth seems to reduce how long diarrhea lasts in children with diarrhea caused by rotavirus.
- Travelers' diarrhea. Taking S. boulardii by mouth seems to reduce the risk of developing diarrhea while traveling.
Possibly Ineffective for
Special Precautions and Warnings
Children: S. boulardii is possibly safe for children when taken by mouth appropriately. But diarrhea in children should be evaluated by a healthcare professional before using S. boulardii.
Elderly: Older adults might have an increased risk of fungal infection when taking S. boulardii. Stay on the safe side and avoid use.
Digestive tract disease: S. boulardii has caused fungal infections in people with diseases of the digestive tract. If you have a digestive tract disease, talk with your healthcare provider before taking S. boulardii.
Weakened immune system: S. boulardii has caused fungal infections in people with weakened immune systems. In many cases, the infection was due to a catheter becoming contaminated. If you have a weakened immune system, talk with your healthcare provider before taking S. boulardii.
Yeast allergy: People with yeast allergy can be allergic to products containing S. boulardii. Stay on the safe side and avoid these products.
Medications for fungal infections (Antifungals) interacts with SACCHAROMYCES BOULARDII
S. boulardii is a fungus. Medications for fungal infections help reduce fungus in and on the body. Taking S. boulardii with medications for fungal infections can reduce the effects of S. boulardii.
Be watchful with this combination
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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.
This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version.
© Therapeutic Research Faculty 2020.