Research · Randomized controlled trial
The effects of spirulina on allergic rhinitis
What it found
Spirulina significantly improved nasal discharge, sneezing, congestion, and itching compared with placebo; the overall evidence base is still small.
- Design
- Randomized controlled trial
- Year
- 2008
- Sample size
- 150
- Population
- patients with allergic rhinitis (double-blind, placebo-controlled)
- Intervention
- spirulina ~2000 mg/day vs placebo
- Outcome
- symptom scores and physical findings
- Journal
- European Archives of Oto-Rhino-Laryngology
Citation last checked 2026-06-21.