Black seed oil applied as nasal drops for 6 weeks helped allergic rhinitis symptoms in 92% of users versus 30% in the placebo group. In mild cases, 100% became symptom-free; in moderate cases, 69% were symptom-free and 25% improved; in severe cases, 58% were symptom-free and 25% improved.

68 people with allergic rhinitis were split into groups based on symptom severity. Half received black seed oil nasal drops for 6 weeks, half received regular oil. Researchers tracked symptom changes and how well people tolerated allergen exposure.

Funding not disclosed in abstract