For Occasional Diarrhea Supports a Healthy Balance of Intestinal Flora Saccharomyces boulardii is a probiotic yeast that survives stomach acid and colonizes the intestinal tract. It promotes the health of the intestinal tract, helps to encourage a healthy gut flora balance, and supports a balanced intestinal response to normal internal and environmental stressors. Saccharomyces boulardii has also been shown to support proper gastrointestinal function during temporary disruptions to the normal balance of gut flora. This yeast-based probiotic is often used in conjunction with an L. acidophilus-based probiotic and is a very important tool in resolving diarrhea and healing inflammation in IBD pets. It is also particularly helpful for antibiotic- associated diarrhea.  Supplement Facts Active Ingredients Saccharomyces boulardii -500mg per capsule(5 Billion CFU)(Saccharomyces cerevisiae var. boulardii I-3799)Other Ingredients Hypromellose (cellulose capsule), Organic Inulin (FOS) (Fructooligosaccharides) and Guar Gum. Administration Dogs Under 50lbs & Cats - 1/2 capsule daily Dogs Over 50lbs - 1 capsule daily For Maintenance, half the dosing. Although this is considered a safe and effective supplement, always monitor your pet's systems & adjust accordingly. If you feel your pet has become constipated, drop the amount.