* It promotes the health of the intestinal tract, helps protect its beneficial microbiota, and enhances immune function. * MOS (MannanOligoSaccharides) is an oligosaccharide from the cell walls of S. cerevisiae that can discourage bacteria from adhering to the epithelial cells and reduce their proliferation. * SACCHAROMYCES BOULARDII+MOS does not require refrigeration and can be stored at room temperature. Refrigeration will, however, extend the shelf life. Avoid temperatures above 77°F (25°C). Room Temperature Stable. Keep out of the reach of children.