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Coronavirus disease 2019, vitamin D and kidney function.
Betsy Szeto1, Lena Fan2, Thomas L Nickolas1,3
1Columbia University Vagelos College of Physicians & Surgeons.
Current Opinion in Nephrology and Hypertension
|May 15, 2021
Summary
Emerging research on vitamin D and COVID-19 shows mixed results. More randomized trials are needed to confirm if vitamin D supplementation protects against infection and severe outcomes.
Area of Science:
- Nutritional Immunology
- Infectious Disease Epidemiology
- Clinical Trial Design
Background:
- Vitamin D deficiency is common and may influence immune responses.
- The relationship between vitamin D levels and COVID-19 susceptibility and severity is under investigation.
- Observational studies have reported associations, but causality remains unclear.
Purpose of the Study:
- To review current evidence on vitamin D and COVID-19 risk and severity.
- To summarize early interventional studies on vitamin D supplementation for COVID-19.
- To highlight the need for robust clinical trials.
Main Methods:
- Systematic review of observational studies and early clinical trials.
- Analysis of associations between vitamin D levels and COVID-19 outcomes.
- Evaluation of interventional data on vitamin D supplementation.
Main Results:
- Observational studies on vitamin D and COVID-19 risk/severity show inconsistent findings.
- Most studies are observational, limiting causal inference.
- Clinical trials on vitamin D supplementation for COVID-19 are scarce.
Conclusions:
- Vitamin D's role in COVID-19 requires further investigation.
- Randomized controlled trials are essential to determine the efficacy of vitamin D supplementation.
- Future research should focus on vitamin D's impact on inflammation and mortality in COVID-19 patients, particularly those with kidney disease.
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