Thorne Sacro-B Sacro-B (Saccharomyces boulardii) is a yeast species that increases the production of a first-line defense immunoglobin (secretory IgA) in the intestinal tract, and helps with occasional diarrhea.* Ingredients One Capsule Contains: Saccharomyces boulardii*250 mg Other Ingredients: Rice Bran, Hypromellose (derived from cellulose) capsule, Calcium Laurate, Silicon Dioxide. *Contains a minimum of 5 billion CFUs per capsule. V17 Suggested Use Take 1 capsule one to three times daily between meals or as recommended by your health-care practitioner. More Info. 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. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS There are no known adverse interactions or contraindications at publication date.