Vitamin D Fuels Performance

According to an article in the NSCA's Performance Training Journal, few vitamins can match vitamin D's impact on so many of the body's functions. In fact, vitamin D receptors are found in nearly every human cell. Because the sun provides about 90% of our vitamin D needs, wintertime in northern latitudes can leave hard-training athletes lacking. That's important since low vitamin D levels can have a negative impact on immune system function along with muscle power and strength.

True Strength Moment: Daily recommendations for vitamin D range from 200 to 600 IUs, depending on age. The older you are, the more vitamin D you need. Since there aren't that many food sources for the sunshine vitamin, a high-potency multivitamin can provide valuable nutrient insurance – especially during the long cold months.
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