* 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.