Vitamin Dís Natural Cycle

Vitamin Dís Natural Cycle Because vitamin D can be synthesized through the skin from the sun's ultraviolet B rays, scientists have known for a while that blood levels are likely to be higher during the summer months. A new study published in the journal PLOS ONE suggests that, for residents of the United States, vitamin D levels peak in August and are at their lowest in February.

After analyzing 3.4 million blood samples taken weekly between July 2006 and December 2011, researchers determined that vitamin D levels don't follow the solar cycle exactly. Blood levels tend to lag behind the seasons, even if people are making an effort to consume fortified foods.

True Strength Moment: Taking a daily multivitamin with a sufficient dose of vitamin D might help stabilize these seasonal fluctuations or make up for lack of sunlight exposure during the summer months.
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