0 0.5 1 1.5+ All studies 21% 64 72,629 Improvement, Studies, Patients Relative Risk Mortality 20% 38 45,489 Ventilation 16% 8 10,115 ICU admission 15% 6 9,921 Hospitalization 16% 14 18,349 Recovery 29% 10 2,182 Cases -8% 5 19,785 Viral clearance -5% 2 236 RCTs 24% 17 1,567 RCT mortality 18% 10 1,000 Peer-reviewed 23% 58 69,125 High dose IV 23% 19 2,121 Symptomatic 25% 61 56,817 Prophylaxis 18% 15 49,941 Early 37% 6 1,243 Late 21% 43 21,445 Vitamin C for COVID-19 c19early.org October 2023 after exclusions Favorsvitamin C Favorscontrol