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0 0.5 1 1.5 2+ Case 92% Improvement Relative Risk c19early.org/q Arslan et al. NCT04377789 Quercetin RCT Prophylaxis Favors quercetin Favors control
Synergistic Effect of Quercetin and Vitamin C Against COVID-19: Is a Possible Guard for Front Liners
Arslan et al., SSRN, doi:10.2139/ssrn.3682517 (Preprint), NCT04377789 (history)
16 Nov 2020    Source   PDF   Share   Tweet
Small prophylaxis RCT with 113 patients showing fewer cases with quercetin + vitamin C + bromelain prophylaxis. NCT04377789 (history). Note that this paper disappeared from SSRN without explanation.
risk of case, 91.7% lower, RR 0.08, p = 0.03, treatment 1 of 71 (1.4%), control 9 of 42 (21.4%), NNT 5.0, adjusted per study, inverted to make RR<1 favor treatment.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
This study is excluded in the after exclusion results of meta analysis: paper no longer available at the source, and the contact does not reply to queries.
Arslan et al., 16 Nov 2020, Randomized Controlled Trial, Turkey, preprint, 7 authors, this trial uses multiple treatments in the treatment arm (combined with vitamin C and bromelain) - results of individual treatments may vary, trial NCT04377789 (history).
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