Vitamin D Deficiency May Increase Risk Of Colds, Flu

Vitamin D may be an important way to arm the immune system against disorders like the common cold. In the largest and most nationally representative study of the association between vitamin D and respiratory infections, people with the lowest blood vitamin D levels reported having significantly more recent colds or cases of the flu. The risks were even higher for those with chronic respiratory disorders, such as asthma and emphysema.

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