Effect of a Probiotic on Seasonal Allergic Rhinitis Symptoms

Adult subjects with documented seasonal allergic rhinitis (SAR) to grass pollen will be assigned to placebo or probiotic groups and take either placebo or probiotic dietary intervention for 8 weeks during the grass pollen allergy season. Total nasal symptom score (TNSS) will be compared over 8 weeks between the two treatment groups.

Inclusion criteria

• Adults aged 18 to 65 years of age at the time of enrolment.
• Established seasonal allergic rhinitis (clinical history of rhinorrhea, congestion, sneezing, pruritis >2 years)
• Positive Skin Prick Test (SPT)to Grass Pollen (GP).
• Presence of specific IgE to Grass Pollen (GP)
• Have a Body Mass Index in the range 19-32 kg/m2
• Have signed the consent form
• Have been instructed during screening and agreed to not take any probiotic containing products outside the study for the study period

Exclusion criteria

• Subjects currently under treatment with antibiotics or undergoing allergen immunotherapy at the time of enrolment
• Pregnancy
• Vasomotor rhinitis, nasal cavity disorders (nasal polyps), ear infections otitis media).
• Other chronic diseases (e.g. gastrointestinal, cardiovascular, infections)
• Subjects diagnosed with asthma
• Subjects currently participating in another interventional clinical trial or having participated in another clinical trial in the last 2 months
• Subjects on chronic use of systemic corticosteroids prior to randomization