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Home   COVID-19 treatment studies for Quercetin  COVID-19 treatment studies for Quercetin  C19 studies: Quercetin  Quercetin   Select treatmentSelect treatmentTreatmentsTreatments
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0 0.5 1 1.5 2+ Symptomatic case 93% Improvement Relative Risk c19quercetin.com/rondanelli.html Favors quercetin Favors control
4 January 2022 - Prophylaxis study
Promising Effects of 3-Month Period of Quercetin Phytosome® Supplementation in the Prevention of Symptomatic COVID-19 Disease in Healthcare Workers: A Pilot Study
Rondanelli et al., Life, doi:10.3390/life12010066 (Peer Reviewed)
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RCT 120 healthcare workers, 60 treated with quercetin phytosome, showing lower risk of cases with treatment. Quercetin phytosome 250mg twice a day. NCT05037240.
risk of symptomatic case, 92.9% lower, RR 0.07, p = 0.04, treatment 1 of 60 (1.7%), control 4 of 60 (6.7%), NNT 20, adjusted per study, Cox proportional risk.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
Rondanelli et al., 1/4/2022, Double Blind Randomized Controlled Trial, placebo-controlled, Italy, Europe, peer-reviewed, 12 authors.
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