Prebiotic product comprises: dried molasses, mixed with a composition of polysaccharides, in which the polysaccharide composition has a fiber content of >;= 80%. Independent claims are included for: (1) symbiotic composition comprising prebiotic product mixed with a composition of probiotic microorganisms, preferably living, dehydrated and encapsulated micro-organisms; (2) food or dietetic product comprising the prebiotic product or the symbiotic composition; (3) cosmetic products comprising prebiotic product or symbiotic composition; (4) medicament comprising the prebiotic product or the symbiotic composition in the form of tablets, gel capsules, powder or granules; (5) preparing the prebiotic product comprising mixing molasses with the polysaccharide composition to obtain a premix and a drying of the premix; and (6) fabricating a symbiotic composition comprising: mixing molasses with the composition of polysaccharides to obtain a premix and a drying of pre-mix, then a step of dried mixing of pre- mixture with the composition of probiotic microorganisms; or mixing molasses with the polysaccharide composition and the composition of probiotic microorganisms to obtain a pre-mix, then a step of drying of the premix. ACTIVITY : Anorectic; CNS-Gen.; Muscular-Gen.; Neuroprotective; Hemostatic; Hypotensive; Nephrotropic; Immunostimulant; Gastrointestinal-Gen.; Gynecological; Antimicrobial. MECHANISM OF ACTION : None given.L'invention concerne un produit prébiotique comprenant :- de la mélasse séchée, en mélange avec- une composition de polyosides,dans laquelle la composition de polyosides présente une teneur en fibres supérieure ou égale à 80%. L'invention concerne également une composition symbiotique comprenant ce produit prébiotique.