A randomized double-blind,placebo-controlled trial published JAMA evaluated the use of Vitamin D supplements for 18 months for the prevention of the common cold.   The study concluded that vitamin D supplementation did not reduce the number, duration or severity of upper respiratory tract infections.  The results did not change due to seasonal variation or baseline Vitamin D levels.  How do you protect yourself from the common cold?

For more information see JAMA

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