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Saccharomyces boulardii (formerly OptiBac Probiotics For bowel calm) 80 caps £22.99 Was £25.99

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View the rest of the Optibac Probiotics product range
View Evidence and Testimonials for Saccromyces Boulardii probiotic

S. boulardii - the internationally acclaimed probiotic that naturally helps to support bowel health, control & function during episodes of diarrhoea.

What's it for? For fast acting bowel calm, comfort and control when you need it most.

Who's it for? For adults and children from 3 years old upwards seeking an effective solution.

Each capsule provides5 billion probiotic cultures of Saccharomyces boulardii.

For bowel calm, Saccharomyces boulardii  

OptiBac Probiotics For bowel calm contains pure Saccharomyces boulardii, a natural and safe probiotic yeast with vast scientific research and documentation on its benefits in supporting bowel health, comfort and function.

S. boulardii has been internationally acclaimed as the number one probiotic for diarrhoea - to reduce discomfort and urgency and to restore control and regular bowel movements. For bowel calm Saccharomyces boulardii is a natural probiotic food supplement and not a medicine. It is a completely natural probiotic offering support for fast acting bowel calm, comfort and control when you need it most.

Background Information

Diarrhoea can be defined as an increase in the frequency and amount of loose stools. It can be caused by a virus or bacteria - usually due to the ingestion of contaminated drinking water, undercooked meat and eggs or poor standards of hygiene.

If these situations occur, the body's reaction to the pathogens is twofold - it introduces large amounts of fluid into the large intestines, and makes the intestines more active by contracting frequently in order to flush out irritable micro-organisms, resulting in diarrhoea.

Drugs such as Loperamide work by preventing muscle contractions in order to stop diarrhoea, but these medicines do not remove the harmful bacteria from the body.

How does For bowel calm work?

Saccharomyces boulardii - a unique probiotic yeast which is sold widely in the US, Scandinavia, Germany & France. S. boulardii has undergone extensive clinical research demonstrating its ability to flush out pathogenic bacteria such as E. coli and Salmonella, in order to work against diarrhoea.


For bowel calm can be given to adults and children (from 3 years old upwards) with the following recommendations:

  • For diarrhoea, take 1 or 2 capsules depending on severity of symptoms, and up to 4 capsules per day, or as professionally directed.
  • For Irritable Bowel Syndrome (IBS), take 1 capsule twice a day.
  • For Inflammatory Bowel Disease (IBD) eg. Ulcerative Colitis, Diverticulitis, Crohn's Disease, take 3 capsules a day.
  • For recurrent >Clostridium difficile infection, take 2 capsules twice a day.
  • For Candida Overgrowth, take 3 capsules twice a day.

NB: For young children or any patient unable to swallow capsules, the content of the capsules can be mixed with a cold meal or beverage.

FAQ: Can I take 2 probiotic supplements at the same time?

Yes! If you want to, and they will have a cumulative effect.


It is not recommended to give probiotics to severely immunosuppressed patients, post cardiac surgery patients, patients with pancreatitis, patients in the Intensive Care Unit (ICU) or patients with blood in the stool unless under a doctor's care.

Full ingredients

Probiotic: Saccharomyces boulardii Unique28; Vegetarian capsule: hydroxypropyl methylcellulose; filler: potato starch; lubricant: magnesium stearate; antiadherant: silicon dioxide.

Suitable for vegetarians.

Each capsule guarantees 5 billion probiotic micro-organisms.


Like the rest of the range, For bowel calm does not require refrigeration.

Store out of direct sunlight.

  • Vegetarian
  • Vegan
  • Sugar free
  • Gluten free
  • Free from artificial colours
  • S.boulardii
  • Natural
  • Digestion
  • Immunity
  • Fast acting
  • Effective