Saccharomyces cerevisiaestrain submitted to National Collection of Cultures of Microorganisms (CNCM) under no 1-3856, is new. Independent claims are included for (1) a S. cerevisiaeyeast obtained from the strain submitted to National Collection of Cultures of Microorganisms under no 1-3856; (2) a composition comprising yeast and/or at least one S. cerevisiaeyeast derivative comprising yeast extracts, derived from walls, wall glucans, mannoproteins, yeast lipids fractions, yeast nucleic acid fraction (RNA and DNA); and (3) a kit comprising a yeast and/or at least one S. cerevisiaeyeast derivative, in a form, which is suitable for oral administration. ACTIVITY : Anabolic; Gastrointestinal-Gen; Antiinflammatory; Antiulcer; Immunosuppressive; Analgesic; Antidiarrheic; Laxative; Antidiabetic; Immunostimulant. MECHANISM OF ACTION : None given.