Probiotic Administration and Perennial Allergic Rhinitis

Inclusion Criteria: * Adults between 20-65 years old * Confirmed allergy (allergic rhinitis) to dust mite for more than 2 years, as determined by anamnesis and by a miniRQLQ of ≥ 1 * Positive Skin prick testing measure greater than 3mm wheal diameter to the dermatophagoides pteronyssinus species of house dust mite extract * Body Mass Index 19-29 * Having obtained his/her informed consent Exclusion Criteria: * Anemia * Allergy to any food or medication * Asthma * Family history of congenital immunodeficiency or chronic consumption (more than one week at Screening) of immunosuppressive or anti-inflammatory treatments * Ongoing treatment with antibiotics or undergoing allergen immunotherapy at Screening * Consumption of probiotic and other dietary nutritional interventions * More than 2 drinks/day alcohol consumption or use of illicit drugs * Pregnant women * Subjects with expected low compliance * Blood donation in the past month or planning to donate blood until a month after the end of the study * Currently participating or having participated in another interventional clinical trial during the last four weeks prior to the beginning the study