There is growing evidence linking vitamin D deficiency with risk of COVID-19. It is therefore
distressing that there is major disagreement about the optimal serum level for 25 …

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 …

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

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 …

Low vitamin D status in winter permits viral epidemics. During winter, people who do not
take vitamin D supplements are likely to have low serum 25-hydroxyvitamin D [25 (OH) D] …

One of the risk factors du jour for coronavirus disease 2019 (COVID-19) has been vitamin D
deficiency. Even Anthony Fauci, MD, has said he takes a vitamin D supplement. Vitamin D …

Background: The immune system (innate and adaptive) is influenced by vitamin D3, which
affects gene expression and inflammatory pathways. An umbrella review was conducted to …

Objective This work aims to review and discuss controversial topics in the field of vitamin D,
SARS-CoV-2 infection, and COVID-19. Methods The International Conferences …

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 …

Vitamin D is associated with biological activities of the innate and adaptive immune systems,
as well as inflammation. In observational studies, an inverse relationship has been found …