“There are two main reasons why respiratory tract infections such as influenza and COVID-19 occur in winter: winter sun and weather and low vitamin D status... Vitamin D is an important component of the body's immune system, and it is low in winter due to low solar ultraviolet-B (UVB) doses from exposure and the low supplement intakes of most. While nothing can be done about winter sun and weather, vitamin D status can be raised through vitamin D supplements…
Vitamin D has several mechanisms that can reduce risk of infections…
Vitamin D deficiency has been found to contribute to acute respiratory distress syndrome, a major cause of death associated with COVID-19…
At this point, what is needed are quickly developed public health studies to evaluate the effect on preventing COVID-19 in the populations that achieved the recommended serum concentrations. Another critically important project would be to evaluate the serum 25(OH)D concentrations of those who develop severe symptoms of COVID-19 infection…
(T)he complex, integrated immune system needs multiple specific micronutrients, including vitamins A, D, C, E, B6, and B12, folate, zinc, iron, copper, and selenium, which play vital, often synergistic roles at every stage of the immune response. Micronutrients with the strongest evidence for immune support are vitamins C and D and zinc. Available evidence indicates that supplementation with multiple micronutrients with immune-supporting roles may modulate immune function and reduce the risk of infection. Thus, more attention should be paid to supporting the immune system when treating COVID-19 patients.”
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