Definitive Evidence from Meta-Analysis and Trial Sequential Analysis
(Italy)
Various studies, a association between severe vitamin D deficiency and bad COVID-19 outcomes.
Vitamin D plays a crucial role in immune function and inflammation.
Recent data suggest a protective role of vitamin D against bad outcomes
Nutraceutical approach
Promote the immune response and reduce the inflammatory response
Anti-inflammatory, antioxidant, and immunomodulatory properties of vitamin D
Immune optimisation and immune boosting
Vitamin D maintains pulmonary barrier function
Determines the production of antimicrobial peptides
Enhances neutrophil activity
Shifts the adaptive immune response to a more T helper cell-2 type
Anti-inflammatory effects of vitamin D
Reduces the production of pro-inflammatory cytokines,
such as IL-6, IL-8, IL-9, IL-12, TNF alfa, IFN gamma
Increases production of anti-inflammatory cytokines,
such as IL-4, IL-5, IL-10
Patients with a low baseline vitamin D, more benefit
Reduce risk of asthma exacerbations
Prevents acute respiratory infections,
and reducing their complications
COVID-19 and vitamin D (Co-VIVID study): a systematic review and meta-analysis of randomized controlled trials
The rates of RT-CR positivity were significantly decreased in the intervention group as compared to the non-vitamin D groups
(RR = )
Conclusively, COVID-19 patients supplemented with vitamin D, fewer rates of ICU admission, mortality events, and RT-PCR positivity.
Meta-analysis and trial sequential analysis (TSA)
Better explain the strength of association
Protective role of vitamin D supplementation,
and risk of mortality / admission to intensive care units
We searched four databases on 20 September 2022.
Screened the randomized clinical trials (RCTs)
Assessed the risk of bias
(how to adjust thresholds for significance in randomised clinical trials when the required sample size has not been reached)
The pre-specified outcomes of interest
Mortality and ICU admission
78 bibliographic citations
Five RCTs were suitable for our analysis
Results
Vitamin D administration results in a decreased risk of death,
Vitamin D administration results in a decreased risk of ICU admission,
Protective role of vitamin D and ICU admission
The TSA of the protective role of vitamin D and ICU admission showed that, since the pooling of the studies reached a definite sample size, the positive association is conclusive.
The studies
Effects of a 2-Week 5000 IU versus 1000 IU Vitamin D3 Supplementation on Recovery of Symptoms in Patients with Mild to Moderate Covid-19: A Randomized Clinical Trial
(Saudi)
Effect of calcifediol treatment and best available therapy versus best available therapy on intensive care unit admission and mortality among patients hospitalized for COVID-19: A pilot randomized clinical study
(Spain)
Changes in the immune response against SARS-CoV-2 in individuals with severe COVID-19 treated with high dose of vitamin D
(Spain)
Effect of a Single High Dose of Vitamin D3 on Hospital Length of Stay in Patients With Moderate to Severe COVID-19
(Brazil)
Calcifediol treatment and COVID-19-related outcomes
(Spain)
Medicines & Healthcare products
Regulatory Agency
86% industry funded
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