Vitamin D supplementation and clinical outcomes in COVID-19: a systematic review and meta-analysis.
R PalM BanerjeeSanjay Kumar BhadadaA J ShettyB SinghA VyasPublished in: Journal of endocrinological investigation (2021)
Vitamin D supplementation might be associated with improved clinical outcomes, especially when administered after the diagnosis of COVID-19. However, issues regarding the appropriate dose, duration, and mode of administration of vitamin D remain unanswered and need further research.