Vitamin D sufficiency, a serum 25-hydroxyvitamin D at least 30 ng/mL reduced risk for adverse clinical outcomes in patients with COVID-19 infection.
Zhila MaghbooliMohammad Ali SahraianMehdi EbrahimiMarzieh PazokiSamira KafanHedieh Moradi TabrizAzar HadadiMahnaz MontazeriMehrad NasiriArash ShirvaniMichael F HolickPublished in: PloS one (2020)
Therefore, it is recommended that improving vitamin D status in the general population and in particular hospitalized patients has a potential benefit in reducing the severity of morbidities and mortality associated with acquiring COVID-19.