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Investigation of potential effects of quercetin on COVID-19 treatment: a systematic review of randomized controlled trials

Beşler et al., Clinical Science of Nutrition, doi:10.62210/ClinSciNutr.2024.86
May 2024  
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Quercetin for COVID-19
22nd treatment shown to reduce risk in July 2021
*, now known with p = 0.0031 from 11 studies.
No treatment is 100% effective. Protocols combine complementary and synergistic treatments. * >10% efficacy in meta analysis with ≥3 clinical studies.
4,200+ studies for 70+ treatments.
Systematic review of RCTs investigating quercetin for COVID-19. Five studies with a total of 803 participants were included. Authors found that quercetin treatment led to reductions in cases, viral persistence, hospitalization, oxygen requirements, fatigue, and inflammatory markers. Treatment was well-tolerated with no major side effects reported.
Reviews covering quercetin for COVID-19 include1-17.
Beşler et al., 25 May 2024, peer-reviewed, 4 authors. Contact:
This PaperQuercetinAll
Investigation of potential effects of quercetin on COVID-19 treatment: a systematic review of randomized controlled trials
Zehra Nur Beşler, Damla Zeynep Bayraktar, Meryem Cemile Koçak, Gül Kızıltan
Clinical Science of Nutrition, doi:10.62210/clinscinutr.2024.86
Objectives: The COVID-19 pandemic has rapidly become a global health crisis. Currently, there are no proven, reliable, specific treatments for COVID-19. Alongside drug interventions, supportive treatments are implemented during the disease. Quercetin, recognized for its antiviral, anti-inflammatory, anti-aging, and antioxidant properties, is under evaluation in this study for its potential impact on preventing, influencing the course, and mitigating the severity of COVID-19.
Conflict of interest: The authors declare that there is no conflict of interest.
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