Optibac Probiotics Saccharomyces boulardii - 80 Vegicaps

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A pure Saccharomyces boulardii supplement

  • Renowned friendly yeast Saccharomyces boulardii - Over 50 years of research in thousands of adults and children, Saccharomyces boulardii live cultures are extremely well-researched 
  • Scientifically proven digestive supplement - Shown to reach the gut alive and complement the body's natural gut bacteria
  • A fast-acting supplement - Can be taken intensively or ongoing, safe for long-term use
  • Easy to take on the go - No need for refrigeration, making this supplement suitable to take with you wherever you go
  • Suitable for those with coeliac disease - Gluten free and vegan supplement
  • Optibac first introduced S.boulardii to the UK - Optibac was the first brand to introduce S. boulardii to the UK, we've been selling it for more than 16 years
  • From the UK's most recommended brand - Optibac is the brand of friendly bacteria supplements most recommended by UK consumers^

Who is it for?

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.

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.

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.

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!


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

Each capsule guarantees 5 billion live cultures.

Recommended use

Natural 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.


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, infants with 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.

Storage instructions

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.


  • 5
    Optibac S.Boulardii

    Posted by Rae Phillips on 30th Nov 2023

    excellent product

  • 5

    Posted by Rae Phillips on 30th Aug 2023

    excellent supplement

  • 4
    S. Boulardii

    Posted by Helen Smith on 5th Dec 2022

    very beneficial for my needs thankyou.

  • 5
    excellent product

    Posted by Rae Phillips on 24th Sep 2022

    helps with stomach problems

  • 5
    S. Boulardii

    Posted by Helen Smith on 14th Feb 2022

    I've been taking these for quite a while and find they really work for me, where others don't.

  • 5

    Posted by Karen on 2nd Mar 2021

    Excellent product for optimum gut health together with excellent service

  • 5
    Probiotics Saccaromyces

    Posted by Cindy Thornton on 22nd May 2020

    Use this to keep bouts of diarrhoea at bay. Nice product - bringing good bacteria to gut and usually my stomach clears up within a day.

  • 5

    Posted by Frances on 2nd Apr 2018

    Effective product and efficient service from Blukoo.
    Prefer blister packs to screw top container for ease of use.

  • 4

    Posted by Elizabeth on 2nd Oct 2017

    I was surprised when my recent order arrived in a plastic screw top container instead of the usual packet with foil strips.
    Whilst the product is still effective, I prefer the strips as they are easier to take away on holiday.