Authors: Murai IH, Fernandes AL, Sales LP, Pinto AJ, Goessler KF. doi: https://doi.org/10.1101/2020.11.16.20232397 Abstract Importance Patients with COVID-19 may exhibit 25-hydroxyvitamin D deficiency, but the beneficial effects of vitamin D3 supplementation in this disease remain to be proven by randomized controlled trials. Objective To investigate the efficacy and safety of vitamin D3 supplementation in patients [...]

The COVID-19 disease course is strikingly divergent. Approximately 80-85% of patients experience mild or no symptoms, while the remainder develop severe disease.

Until treatment and vaccine for coronavirus disease-2019 (COVID-19) becomes widely available, other methods of reducing infection rates should be explored. This study used a retrospective, observational analysis of deidentified tests performed at a national clinical laboratory to determine if circulating 25-hydroxyvitamin D (25(OH)D) levels are associated with severe acute respiratory disease coronavirus 2 (SARS-CoV-2) positivity rates.

New research provides evidence of an impaired vitamin D gene signature in CD4+ T cells in patients with severe COVID-19. Mechanistically, it is shown that vitamin D alters the epigenetic landscape of CD4+ T cells, as well as inducing key transcription factors such as STAT3, BACH2 and JUN that reduce levels of IFN-γ and increase IL-10. These changes generate pro-resolving TH1 cells that may be beneficial in resolving or preventing severe COVID-19.

Authors: Henriquez MS, de Tejada Romero MJ PMID: 32486496 PMCID: PMC7352679 doi: 10.3390/nu12061617 Abstract Vitamin D deficiency is a global health problem due to its high prevalence and its negative consequences on musculoskeletal and extra-skeletal health. In our comparative review of the two exogenous vitamin D supplementation options most used in our care setting, we [...]

To investigate the association between serum 25-hydroxyvitamin D levels and its effect on adverse clinical outcomes, and parameters of immune function and mortality due to a SARS-CoV-2 infection.

The aim of the present study is to summarize existing literature on vitamin D levels in adults in different continents and different countries worldwide. The best determinant of vitamin D status is the serum concentration of 25-hydroxyvitamin D (25(OH)D).

In the preantibiotic era, TB of the skin was treated successfully with UV light. By the 1920s, pulmonary TB was being treated with regular sun exposure. During the last decade, basic laboratory research into the antimicrobial actions of vitamin D has provided new insights into these historical observations.

Authors: Heaney RP, Armas LA, Shary JR, Bell NH, Binkley N, Hollis BW PMID: 18541563 DOI: 10.1093/ajcn/87.6.1738 Abstract Background: Neither the efficiency of the 25-hydroxylation of vitamin D nor the steady state relation between vitamin D(3) and 25-hydroxyvitamin D [25(OH)D] has been studied in humans. Objective: We aimed to examine the relation between serum vitamin [...]