Seasonal Allergic rhinitis (SAR) is characterized by a runny nose, congestion, sneezing and sinus pressure. A clinical study was performed to demonstrate the efficacy of food supplement containing Quercetin, Perilla frutescens, and Vitamin D3.
23 subjects enrolled in the open clinical study had at least one-year history of allergic rhinitis and positive skin prick test or RAST to Parietaria Officinalis pollen. At baseline, the subjects had symptoms of nasal and/or ocular seasonal allergic rhinitis.
All subjects enrolled completed the study. The comparison of the scores obtained in the two visits (baseline and final) showed a highly significant reduction of the overall symptoms: approximately 70% for symptom scores of the quercetin-containing supplement.
Sneezing, rhinorrhea, nasal obstruction, ocular itching, lacrimation and congestion of the conjunctiva, all showed a highly significant reduction. No noteworthy side effect was recorded and all patients finished the study with good compliance.
The researchers concluded:
“The results showed a clear efficacy of the quercetin-containing supplement in reducing nasal and/or eye symptoms. This activity was objectively confirmed by the reduction in the consumption of anti-allergic drugs used to relieve symptoms.”