There is still limited evidence regarding the influence of vitamin D in people with COVID-19.
In this systematic review and meta-analysis, we analyze the association between vitamin D …

OBJECTIVES Although vaccination has started, coronavirus disease 2019 (COVID-19)
poses a continuing threat to public health. Therefore, in addition to vaccination, the use of …

Background We sought to evaluate the association between vitamin D deficiency and the
severity of coronavirus disease 2019 (COVID‐19) infection. Methods Multiple databases …

Background Observational studies suggest that the risk and clinical prognosis of coronavirus
disease 2019 (COVID-19) are related to low vitamin D status; however, the data are …

Background: Coronavirus disease (COVID-19) is a respiratory and systemic disorder caused
by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) or novel Coronavirus …

Background The associations between vitamin D and coronavirus disease 2019 (COVID-19)
infection and clinical outcomes are controversial. The efficacy of vitamin D supplementation …

Structured abstract Importance Vitamin D deficiency increases the incidence of respiratory
virus infections. More than 1 billion people worldwide are vitamin D deficient. If vitamin D …

Objective The relationship between 25-hydroxyvitamin D3 (25 (OH) D), the surrogate marker
for vitamin D3, serum concentration and COVID-19 has come to the forefront as a potential …

Background Evidence recommends that vitamin D might be a crucial supportive agent for
the immune system, mainly in cytokine response regulation against COVID‐19. Hence, we …

Importance Vitamin D treatment has been found to decrease incidence of viral respiratory
tract infection, especially in vitamin D deficiency. It is unknown whether COVID-19 incidence …