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"When you take vitamin D, you lower your chances of getting sick from viral infections, like colds and the flu, by at least 10 percent. But people who are deficient in vitamin D actually see a greater protective benefit when they supplement, reducing their risk by 50 percent. "
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"Research even shows that optimal vitamin D levels boost the effectiveness of the flu vaccine."
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Those with the lowest serum concentrations had the highest chances of getting viral infections."
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Research shows that for every 4 ng/mL increase in your vitamin D concentrations in the blood, you lower your odds of getting the flu by seven percent."
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