Background: Several studies suggest an association between serum 25-hydroxyvitamin D
(25OHD) and the outcomes of Severe Acute Respiratory Syndrome Corona-Virus-2 (SARS …

Background Disease severity and mortality rates due to COVID-19 infection are greater in
the elderly and chronically ill patients, populations at high risk for vitamin D deficiency …

Purpose Vitamin D deficiency/insufficiency may increase the susceptibility to coronavirus
disease 2019 (COVID-19). We aimed to determine the association between vitamin D …

Background: Open Access Editor's Choice Systematic Review COVID-19 Mortality Risk
Correlates Inversely with Vitamin D3 Status, and a Mortality Rate Close to Zero Could …

Purpose To analyze the associations between cholecalciferol or calcifediol
supplementation, serum 25-hydroxyvitamin D (25OHD) levels and COVID-19 outcomes in a …

To assess the evidence on SARS-CoV2 infection and Covid-19 in relation to deficiency and
supplementation of vitamin D, we conducted a systematic review up to April 2021. We …

Background: This systematic review and meta-analysis aimed to assess whether low serum
25-hydroxyvitamin D (25-OHD) level is associated with susceptibility to COVID-19, severity …

Insufficient blood levels of the neurohormone vitamin D are associated with increased risk of
COVID-19 severity and mortality. Despite the global rollout of vaccinations and promising …

In this review we summarize the impact of bolus versus daily dosing of vitamin D on 25 (OH)
D and 1, 25 (OH) 2D levels, as well as on key countervailing factors that block vitamin D …

This systematic review was conducted to summarize and clarify the evidence on the
association between 25-hydroxyvitamin-D [25 (OH) D] concentrations and coronavirus …