During the pandemic, Vitamin D deficiency was recognised as one of the main risk factors for poor COVID-19 prognosis, along with obesity and old age. Many of the phenotypic markers of poor prognosis also correlated to symptoms of vitamin D deficiency.
Studies have shown that increased Vitamin D intake/supplementation has led to a significant reduction in respiratory infection caused by COVID-19. Additionally, a greater risk of COVID-19 has been associated with reduced ultraviolet exposure. Interestingly, Vitamin D deficiency, like COVID-19, is linked with darker skin colour as well as obesity.
According to Subramaniam et al., (2022), while more interventional studies are required to consider the role of Vitamin D supplementation as well as its formulation and dose, it has been observed that generally avoiding the deficiency by regular low-dose daily supplementation, particularly in the winter months, is encouraged. This is especially important post-pandemic.
Can Vitamin D protect against COVID?
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