Inactive until hydroxylated hepatically to 25-hydroxyvitamin D then renally to the active metabolite 1,25-dihydroxyvitamin D (calcitriol) (IOM 2011) ExcretionĬirculating: 25(OH)D: 2 to 3 weeks 1,25-dihydroxyvitamin D: ~4 hours Use: Labeled Indicationsĭietary supplement: As a vitamin D dietary supplement Use: Off Label The active metabolite, 1,25-dihydroxyvitamin D (calcitriol), stimulates calcium and phosphate absorption from the small intestine, promotes secretion of calcium from bone to blood promotes renal tubule phosphate resorption (IOM 2011) Pharmacokinetics/Pharmacodynamics Metabolism Tablet Chewable, Oral :Ĭholecalciferol (vitamin D 3) is a provitamin. Vitamin D3 Ultra Potency: 1.25 MG (50000 UT) Vitamin D3 Super Strength: 50 MCG (2000 UT) Pronutrients Vitamin D3: 25 MCG (1000 UT) Excipient information presented when available (limited, particularly for generics) consult specific product labeling.
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