US doctors often prescribe Drisdol (vitamin D2) for vitamin D deficiency, giving 50,000 IU every week. What does the research say about Drisdol?
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Dr. Cannell reviews a paper on vitamin D levels in professional basketball players and discusses the route athletes can take to become sufficient in vitamin D.
Prescription vitamin D (D2) less effective than over-the-counter vitamin D (D3) according to a meta-analysis.