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The Who, Why, and When of Vitamin D Screening

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  • I recommend getting your vitamin D level tested at least once per year, when your levels are likely to be at its lowest. For people in the northern hemisphere, this would be around January or February


This is an older article that may not reflect Dr. Mercola’s current view on this topic. Use our search engine to find Dr. Mercola’s latest position on any health topic.


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