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How long before testing vitamin D levels should one stop vitamin D supplementation? I'm surprised to not be able to find the answer to this question anywhere on the internet. But maybe it's because it doesn't matter. I just know that for other kinds of nutrients/supplements, it's important to stop a few days beforehand for an accurate reading (or it usually shows much higher than what's really being retained), and I thought I would check. Thank you!

Asked by  mara06 on January 21, 2015

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