0 0.5 1 1.5+ All studies -10% 10 44,354 Improvement, Studies, Patients Relative Risk Mortality -53% 6 34,077 Ventilation 1% 1 9,229 ICU admission 17% 1 9,267 Hospitalization 28% 1 2,148 Cases 9% 4 8,129 RCTs 88% 1 363 Sufficiency 12% 4 481 Prophylaxis -10% 10 44,354 Vitamin B9 for COVID-19 c19early.org October 2023 Favorsvitamin B9 Favorscontrol