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(Just keep in mind: RBC testing is not available for all micronutrients, including vitamin D.) What your results actually mean (and why "normal" isn't always optimal) Once your blood is drawn, your levels are compared to a reference range of "normal" values for a nutrient to assess your status
Always follow your prescription, pharmacy label, and provider instructions over any online calculator
For long-term storage, aliquot and freeze at -20C
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