Vitamin D is an essential nutrient for human health, occurring in two forms - D3, which comes from animal sources and sun exposure, and D2, which comes from vegetable sources. Doctor's Data uses the LC/MS QQQ method to measure Vitamin D2, D3, and total Vitamin D. This is the blood spot version of the test. It is also available as a serum test.
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On December 11th, join Dr. Terry Wahls in a 
