Antiandrogens
Aspirin
Bamlanivimab
Bromhexine
Budesonide
Casirivimab/i..
Colchicine
Conv. Plasma
Curcumin
Ensovibep
Favipiravir
Fluvoxamine
Hydroxychlor..
Iota-carragee..
Ivermectin
Melatonin
Metformin
Molnupiravir
N-acetylcys..
Nigella Sativa
Nitazoxanide
Paxlovid
Povidone-Iod..
Probiotics
Proxalutamide
Quercetin
Remdesivir
Sotrovimab
Vitamin A
Vitamin C
Vitamin D
Zinc

Other
Feedback Home
Home   COVID-19 treatment studies for Quercetin  COVID-19 treatment studies for Quercetin  C19 studies: Quercetin  Quercetin   Select treatmentSelect treatmentTreatmentsTreatments
Antiandrogens (meta) Metformin (meta)
Aspirin (meta) Molnupiravir (meta)
Bamlanivimab (meta) N-acetylcys.. (meta)
Bromhexine (meta) Nigella Sativa (meta)
Budesonide (meta) Nitazoxanide (meta)
Casirivimab/i.. (meta) Paxlovid (meta)
Colchicine (meta) Povidone-Iod.. (meta)
Conv. Plasma (meta) Probiotics (meta)
Curcumin (meta) Proxalutamide (meta)
Ensovibep (meta) Quercetin (meta)
Favipiravir (meta) Remdesivir (meta)
Fluvoxamine (meta) Sotrovimab (meta)
Hydroxychlor.. (meta) Vitamin A (meta)
Iota-carragee.. (meta) Vitamin C (meta)
Ivermectin (meta) Vitamin D (meta)
Melatonin (meta) Zinc (meta)

Other Treatments Global Adoption
All Studies   Meta Analysis
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Case 92% Improvement Relative Risk c19quercetin.com/arslan.html Favors quercetin Favors control
16 November 2020 - Prophylaxis study
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)
Source   PDF   Share   Tweet
Small prophylaxis RCT with 113 patients showing fewer cases with quercetin + vitamin C + bromelain prophylaxis. NCT04377789. 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.
Effect extraction follows pre-specified rules prioritizing more serious outcomes.
This study is excluded in the after exclusion results of meta analysis: paper no longer available at the source, and contact does not reply to queries.
Arslan et al., 11/16/2020, Randomized Controlled Trial, Turkey, Europe, preprint, 7 authors, this trial uses multiple treatments in the treatment arm (combined with vitamin C and bromelain) - results of individual treatments may vary.
All Studies   All Outcomes
Please send us corrections, updates, or comments. Vaccines and treatments are both valuable and complementary. All practical, effective, and safe means should be used. Elimination of COVID-19 is a race against viral evolution. No treatment, vaccine, or intervention is 100% available and effective for all current and future variants. Denying the efficacy of any method increases mortality, morbidity, collateral damage, and the risk of endemic status. We do not provide medical advice. Before taking any medication, consult a qualified physician who can provide personalized advice and details of risks and benefits based on your medical history and situation. WCH and FLCCC provide treatment protocols.
  or use drag and drop   
Submit