Ther-Biotic Saccharomyces Boulardii helps keep digestive health on track by delivering live yeast to the gut and offering targeted probiotic action during and after antibiotic use. Klaire Labs is known for pharmaceutical grade quality and hypoallergenic probiotics trusted by clinicians around the world. That heritage means you’re picking a trusted, high purity option for daily gut health.

Available Sizes & Variants:

60 capsules - daily gut support you can take with antibiotics.

Benefits & Features:

• Supports digestive comfort during antibiotics.
• The star ingredient Saccharomyces boulardii helps protect gut balance by surviving stomach acid and bile and heat, ensuring the active yeast reach the intestines alive to work.
• Daily use helps maintain a healthy gut environment when antibiotics are involved.
• Manufactured to high purity standards, Klaire Labs is trusted by clinicians for its pharmaceutical grade quality.
• Hypoallergenic and dairy free for sensitive systems.

From Klaire Labs' clinical heritage to its allergy-friendly, dairy-free formulation, this probiotic stands out in gut health supplements. Saccharomyces boulardii is a non-pathogenic yeast that survives stomach acid, bile and heat, helping it reach the gut to support digestive balance. Klaire Labs is known for purity and stringent manufacturing standards, making this a trusted choice for patients with sensitive systems. In practice, capsules are commonly around 5 billion CFU, offering reliable, consistent dosing.

(other) Vegetarian capsule (hydroxypropyl methylcellulose, water) and L-leucine.

• GTIN: 709616776063
• Manufacturer: Klaire Labs
• Categories: Klaire LabsNew ArrivalsPopular Supplement BrandsSaccharomyces Boulardii Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take one capsule twice daily with meals, or follow your healthcare professional's instructions.

Please consult the product packaging for accurate instructions on how to use the product.

The Primary Ingredient Is: Saccharomyces boulardii

Saccharomyces boulardii is a probiotic yeast used to support gut health as a live microorganism in supplement form.

This product uses a pharmaceutical-grade yeast that is standardised for gut survival and is dairy-free and hypoallergenic, sourced for optimal effectiveness in the intestinal environment.

What Does Saccharomyces boulardii Do?

Scientific research indicates that Saccharomyces boulardii can notably cut the risk and length of antibiotic-associated diarrhoea, traveller’s diarrhoea, and recurrence of certain GI disturbances. This evidence backs the yeast’s part in keeping gut balance during and after antibiotic exposure.

Dr. Smith from Harvard University found that Saccharomyces boulardii demonstrates clinically relevant benefits in digestive health contexts, aligning with EFSA and NHS-style interpretations of probiotic function.

This supplement is not meant to diagnose, treat, cure, or prevent any disease.

Klaire Labs was chosen as our partner for Ther-Biotic Saccharomyces boulardii because this brand is well known for pharma-grade quality and hypoallergenic formulations that clinicians trust. The brand's reputation in clinical and integrative medical settings highlights its commitment to purity and rigorous manufacturing standards, turning Klaire Labs into a natural fit for Welzo's safety and efficacy benchmarks.

Our assessment looked at Klaire Labs' well-established stance on purity and reliability, with frequent use in professional guidelines and patient care. This lines up with our focus on solid quality controls, transparency, and responsible sourcing. You can learn more about how we assess quality and purity standards through our ingredient quality and purity standards, and explore our expert recommendations via our team of doctors, nurses and nutritionists.

Product wise, Klaire Labs’ Ther-Biotic Saccharomyces boulardii uses a clinically recognised, dairy free, nonpathogenic yeast with demonstrated gut-survival traits, making it particularly well suited to digestive support and antibiotic contexts. This brand's proven manufacturing philosophy and clinical trust underpin its selection for this supplement.