Vitamin D deficiency co-exists in patients with COVID-19. At this time, dark skin color,
increased age, the presence of pre-existing illnesses and vitamin D deficiency are features …

This review focuses on the biologic importance of the vitamin D binding protein (DBP) with
emphasis on its regulation of total and free vitamin D metabolite levels in various clinical …

Background The role of vitamin D status in COVID-19 patients is a matter of debate.
Objectives To assess serum 25-hydroxyvitamin D (25OHD) levels in hospitalized patients …

Objective: Vitamin D deficiency has been associated with an increased risk of COVID-19
severity. This multi-center randomized clinical trial aims to determine the effects of 5000 IU …

Context. Calcifediol has been proposed as a potential treatment for COVID-19 patients.
Objective: To compare the administration or not of oral calcifediol on mortality risk of patients …

Background and aim: Vitamin D deficiency is frequently reported in patients with SARS-CoV-
2 infection. The aim of this study was to correlate the 25OH-Vitamin D serum concentrations …

The last couple of decades have seen an explosion in our interest and understanding of the
role of vitamin D in the regulation of immunity. At the molecular level, the hormonal form of …

It remains uncertain as to whether nutrient supplementation for the general population
considered healthy could be useful in the prevention of RTIs, such as COVID‐19. In this …

Introduction Inflammation is believed to be a contributing factor to many chronic diseases.
The influence of vitamin D deficiency on inflammation is being explored but studies have not …

Background The relationship between vitamin D status and COVID-19-related clinical
outcomes is controversial. Prior studies have been conducted in smaller, single-site, or …