How to read my vitamin D results in my blood test results? Also, is vitamin D 3000-4000 units a day safe for older adults that are in heart medication and other meds -
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The effect of vitamin D supplementation on serum total 25(OH) levels and biochemical markers of skeletal muscles in runners | Journal of the International Society of Sports Nutrition | Full Text
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Ratio of 25(OH)D-to-24,25(OH)2D: A new test to confirm 24-hydroxylase (CYP24A1) deficiency as the cause of hypercalcemia - Mayo Clinic
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