In this 154 patient prospective cohort study in India, individuals with severe COVID-19 had lower vitamin D levels and were more likely to be vitamin D deficient. Deficient patients were more likely to pass...
In this 40 person randomized, placebo-controlled study in India a greater proportion of vitamin D-deficient individuals with mildly symptomatic COVID-19 infections tested COVID-19 negative...
This 129 person cohort study conducted in Italy did not report a relationship between vitamin D levels and health outcomes in the enrolled COVID-19 population.
In this small, case control study conducted in China there was an association between vitamin D deficiency and COVID-19, especially in severe cases.
In this cohort study of 489 patients who had a vitamin D level measured in the year before COVID-19 testing, the relative risk of testing positive for COVID-19 was 1.77 times greater for patients with likely deficient vitamin D status compared...
Plasma 25(OH)D levels less than 75 nmol/L appear to be an independent risk factor for COVID-19 infection and hospitalization in the Israeli population.
In this small, quasi experimental study, elderly, frail nursing home residents in France diagnosed with COVID-19 who were given a high, single dose of vitamin D during or just before COVID-19 infection experienced an improved survival rate...
