Vitamin D deficiency appeared as a worldwide pandemic markedly earlier than the COVID-
19 pandemic was announced in global media. Unfortunately, vitamin D deficiency is still …

A number of observational studies and reviews on the potential role of vitamin D in COVID-
19 have been published since the beginning of this ongoing global pandemic. In the …

As the world's attention has been riveted upon the growing COVID-19 pandemic, many
researchers have written brief reports supporting the hypothesis that vitamin D deficiency is …

Vitamin D deficiency is a pandemic disorder affecting over 1 billion of subjects worldwide
and displaying a broad spectrum of implications on cardiovascular and inflammatory …

Vitamin D is a hormone regulating the immune system and playing a pivotal role in
responses to microbial infections. It regulates inflammatory processes by influencing the …

BACKGROUND The industrial revolution led physicians such as Sniadecki (in 1840) to
notice that sunlight is protective for human health (Norval, 2005). Children living in the …

While a low vitamin D state has been associated with an increased risk of infection by SARS-
CoV-2 in addition to an increased severity of COVID-19 disease, a causal role is not yet …

Vitamin-D receptors are found in a variety of cells with the potential to regulate many cellular
functions. Higher COVID-19 severity has been reported in individuals, which are known to …

Sažetak Vitamin D may reduce the risk of respiratory tract viral infection, and the severity and
duration of the disease as well. Respiratory epithelial cells, monocytes/macrophages …

Vitamin D is a hormone that acts on many genes expressed by immune cells. Evidence
linking vitamin D deficiency with COVID-19 severity is circumstantial but considerable—links …