[object Object]

OptiBac Probiotics


Suitable for Vegans


Optibac Saccharomyces Boulardii is aclaimed as the probiotic of choice in the treatment of diarrhoea. Saccharomyces Boulardii's benefits include working quickly and not causing constipation, a common complaint with users of anti-diarrhoea drugs. In addition, S. boulardii helps to boost immunity.  With 5 billion live cultures per capsule, this is for anyone looking to purchase a pure Saccharomyces boulardii supplement an extensively researched, unique friendly yeast proven to reach the gut alive.

Saccharomyces Boulardii probiotic strain has been internationally acclaimed as a well-researched and unique microorganism, and has been safely used for the last 50 years. Saccharomyces boulardii is a natural food supplement, and not a medicine.

Optibac Probiotics Saccharomyces Boulardii is a unique microorganism which is sold widely in the US, Scandinavia, Germany & France. This microorganism is more robust to environmental stressors than more common bacterial live cultures, and shows strong resistance to heat, humidity and stomach acidity levels. These live cultures of S. boulardii have been tested and shown to be especially stable and resistant.

Benefits of Optibac Probiotics Saccharomyces Boulardi:

  • Each capsule contains 5 billion live cultures of pure Saccharomyces boulardii guaranteed until end of expiry
  • Saccharomyces boulardii is an extremely well-researched, internationally acclaimed friendly yeast
  • It has been used safely around the world for over 50 years
  • Scientifically proven to pass through stomach acidity and survive to reach the gut
  • Complements your natural gut bacteria
  • Easy to take on the go – no refrigeration required
  • Suitable from 1 year onwards
  • Can be used intensively or on an ongoing basis

Directions: As a food supplement suitable for adults and children (from 1 year onwards) with the following recommendations. Take 1 capsule daily. May be increased up to 6 capsules daily as desired (depending on severity of symptoms) or as professionally directed.  For young children the use should be lowered. 1 capsule daily, may be increased up to 3 capsules daily.  If taking anti-fungals, take separately (at least 2 hours apart).  For those unable to swallow capsules, open and mix contents with a cool drink/food.  For best results, do not remove desiccant sachet from the glass jar and close lid firmly after each use.  Store in a cool, dry place below 25°C and out of direct sunlight.  Do not exceed the daily dose. 

Live cultures are not recommended for those with serious medical conditions e.g. those who are severely immunosuppressed, have pancreatitis, are in the ICU, have melaena, have a central venous catheter, short bowel syndrome, or patients with open wounds following major surgery; unless under a doctor's care. Keep out of reach of children.

Gut health supplements are not intended to prevent, treat or diagnose any medical conditions. If taking probiotic supplements for gut health, note that these should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. If you are taking any medications or have a serious medical condition, consult a doctor before use. Optibac supplements will not cause dependency and may be used on an ongoing basis.

Pregnant or breastfeeding women should consult their doctor before taking Saccharomyces boulardii.

Live cultures: Saccharomyces boulardii (275mg); vegetarian capsule: hydroxypropyl methylcellulose

Each capsule guarantees 5 billion live cultures.


  • Vegan
  • Vegetarian
  • No dairy
  • Gluten free
  • Soy free
  • No added sugars
  • Free from artificial flavourings, colourings and preservatives
  • No chemicals or parabens
  • GMO free

Can S.boulardii be taken with other live cultures?
Yes! In fact, it’s highly recommended.  S. boulardii does not colonise for long in the gut but it harmonises extremely well with all types of friendly bacteria, so most people take them in combination.

Can Saccharomyces Boulardii be used alongside antibiotics?
Research shows that the friendly yeast Saccharomyces Boulardii is suitable to take alongside antibiotic medication. This has also been mentioned in a ZOE podcast. We recommend taking S. Boulardii 2 hours before or after antibiotics.

How much S boulardii should I take? 
Our gut microbiomes are unique, so the response to Saccharomyces boulardii varies. If taking Optibac S. Boulardii supplement, each capsule contains 5 billion live cultures. Try 1-2 capsules initially (or a stronger 3-4 capsules together if desired) and increase if necessary up to a maximum of 6 capsules (30 billion live cultures) spread over the day. Within these guidelines, then take as much or as little as you need, on an occasional or ongoing basis.

Is Saccharomyces boulardii a friendly bacteria strain?
Saccharomyces boulardii is one of the most highly researched strains in the world! But it’s actually a friendly yeast, not a type of bacteria. This internationally acclaimed strain has been used safely (1,2) for over 50 years around the world, but it was Optibac that first introduced a Saccharomyces boulardii supplement to the UK.

(1). McFarland L.V., (2010), ‘Systematic review and meta-analysis of Saccharomyces boulardii in adult patients’. World Journal of Gastroenterology, 16(18):2202–2222. (2). Kelesidis T, Pothoulakis C.(2012) ‘Efficacy and safety of the probiotic Saccharomyces boulardii for the prevention and therapy of gastrointestinal disorders’ Therapeutic Advances in Gastroenterology. 2012;5(2):111-125.

When should I take S. boulardii?
It’s easy to take S. boulardii live cultures – they can be taken at any time of day, with or without food! This friendly yeast is more robust than most bacteria (1), and can resist high heat, humidity, and stomach acid levels. It doesn’t need refrigeration, so you can take it with you, wherever you go!

(1). Hossain M et al., (2020) Identification and Growth Characterization of a Novel Strain of Saccharomyces boulardii Isolated From Soya Paste. Frontiers in Nutrition, 2020; 7: 27.

What makes Saccharomyces Boulardii suitable for travel?
As a friendly yeast, Saccharomyces boulardii is hardier than most good bacteria. It survives well in very hot or humid conditions (1), doesn’t require refrigeration and can be taken with or without food. It’s the perfect ‘friend’ to take on your worldwide travels!  

(1). Hossain M et al., (2020) Identification and Growth Characterization of a Novel Strain of Saccharomyces boulardii Isolated From Soya Paste. Frontiers in Nutrition, 2020; 7: 27.

Food supplements should not be used as a substitute for a varied diet. Store in a cool, dry place away from direct sunlight. Keep out of reach of young children. Do not exceed the daily dose.  If pregnant, or breastfeeding, or if you are taking medication, or on medical care, consult your physician prior to use.  While we work to ensure that product information on our website is correct, on occasion manufacturers may alter their ingredient lists.  Actual product packaging and materials may contain more and/or different information than that shown on our website.  All information about the products on our website is provided for information purposes only. We recommend that you do not solely rely on the information presented on our website.  Please always read the labels, warnings, and directions provided with the product before using or consuming a product.  In the event of any safety concerns or for any other information about a product please carefully read any instructions provided on the label or packaging and contact the manufacturer.  Content on this site is not intended to substitute for advice given by medical practitioner, pharmacist, or other licensed health-care professional. Contact your health-care provider immediately if you suspect that you have a medical problem.  Information and statements about products are not intended to be used to diagnose, treat, cure, or prevent any disease or health condition.  The customer reviews are only moderated for offensive content – they should not be regarded as medical or health advice; no reliance should therefore be placed on them; and they are not endorsed by Victoria Health. If you have any health problems or questions regarding the suitability of any product please contact a health professional. Products are not medicinal unless otherwise stated. Victoria Health accepts no liability for inaccuracies or misstatements about products by manufacturers or other third parties. This does not affect your statutory rights.

Product Code: OPB0003