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Sacro-B (Saccharomyces boulardii) by Thorne offers a yeast that mitigates occasional diarrhea and supports the growth of beneficial gut flora.


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Sacro-B (Saccharomyces boulardii) by Thorne is a yeast species that enhances immune function in the gut by increasing sIgA and is effective for antibiotic-associated diarrhea.

Ingredient Information

Geometric Shape

Key Ingredients

Ingredient Amounts

Serving Size: 1 Capsules
Servings Per Container: 60
Name Amount
Saccharomyces boulardii 250 mg
Other Ingredients: Calcium Laurate, Delayed Release Capsule, Medium Chain Triglycerides, Rice Bran

How to Use

Take 1 capsule one to three times daily between meals or as recommended by one of our health coach professionals.

Sacro-B™ Details

In clinical studies, Saccharomyces boulardii has demonstrated its ability to increase the production of secretory IgA, the first-line defense immunoglobin of the gastrointestinal tract.

In addition to enhancing immune function in the gut, this yeast species also supports the growth of beneficial intestinal flora, and it can also be helpful for mitigating occasional diarrhea. With a minimum of 5 billion CFUs per capsule, Thorne’s product provides substantial support to the health of the gastrointestinal tract.


Allergy Warning
This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. Sacro-B contains a product derived from yeast.

If pregnant, consult your health professional before using this product.

There are no known adverse interactions or contraindications at publication date.



Our Mission

We believe personalized, scientific wellness can extend the duration of one's health span, create happier and healthier lives, and feel one’s best at every age and life stage. Our ambition is to empower individuals to live healthier for longer through personalized, scientific testing and solutions. With a deep portfolio of personalized offerings – testing that provides individualized data, educational resources, and products that support specific health goals and needs – Thorne is here at every age and life stage. Thorne is redefining what it means to live healthier for longer.

How we know our supplements work

At Thorne, being able to rely on the safety and efficacy of our nutritional supplement products is the motivating force behind our clinical trials program. Our confidence that each product we formulate and manufacture works in the body comes from extensive clinical research and medical literature that substantiate the presence of each ingredient in each formula. In addition to confirming the safety of our products, clinical research helps us better understand their efficacy. And it paves the way for new discoveries. The ultimate goal of our research partnerships is to help us fulfill our mission of solving the biggest challenges in health and wellness.
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