Friendly bacteria, the 'gardens in our gut', are vital to optimal health. These intestinal flora assist in absorbing nutrients from our food, as well as preventing pathogenic bacteria , such as E.Coli, from growing. Stress, drugs, and overuse of antiobiotics can deplete these good guys. Our 35 BILLION Probiotic is an 8 strain combination, with prebiotics FOS and patented arabinogalactans, which support the probiotics' growth. We use patented probiotic strains that have been deliberately cultivated in harsh conditions* to ensure their strength in our bodies. In addition to choosing the most viable potent strains available, we also add extra - so we can guarantee the potency at the Best By Date, not the day they were made! Patented polymatrix system guarantees stability at room temperature, no need to refrigerate McGuff's probiotics. We also offer Power-Dophilus 2 strain (#1651) and Power-Dophilus 8 strain Probiotic #8610). View Product Information Sheet (PDF) *B.E.A.R.S. Strains - Bio-Enhanced Acid Resistant Strains (B.E.A.R.S.). These strains are specifically designed to be compatible with the gastric and intestinal secretions associated with the digestive process. B.E.A.R.S. eliminates the need for an enteric-coated delivery system.