The present invention refers to a prebiotic mixture comprising at least one plant polysaccharide fiber and at least one of Propolis and/or Olea europaea and/or Aloe vera extracts, optionally comprising also Thymus vulgaris and/or Agrimonia eupatoria extracts. Moreover, the present invention also relates to said mixture for use in the preservation and/or in the restoration of the intestinal microbiota balance.