Our most potent probiotic formula contains a minimum of 30 billion viable organisms per serving. Utilizing an 8 strain proprietary blend, this formula provides support for a healthy digestive system. Also containing a prebiotic (FOS) to support the body's ability to produce its own friendly bacteria. Using a patented system (Patent # 6,653,062) this unique formula provides protection to the organisms from stomach acid breakdown and also eliminates the need for refrigeration. Available in size 30 and 60 vegetarian capsules.