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  2. Vitamin D - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D

    Unlike the other twelve vitamins, vitamin D is only conditionally essential - in a preindustrial society people had adequate exposure to sunlight and the vitamin was a hormone, as the primary natural source of vitamin D was the synthesis of cholecalciferol in the lower layers of the skin's epidermis, triggered by a photochemical reaction with ...

  3. Cholecalciferol - Wikipedia

    en.wikipedia.org/wiki/Cholecalciferol

    The Institute of Medicine in 2010 recommended a maximum uptake of vitamin D of 4000 IU/d, finding that the dose for lowest observed adverse effect level is 40,000 IU daily for at least 12 weeks, [25] and that there was a single case of toxicity above 10 000 IU after more than seven years of daily intake; this case of toxicity occurred in ...

  4. Ergocalciferol - Wikipedia

    en.wikipedia.org/wiki/Ergocalciferol

    Other names: vitamin D 2: AHFS/Drugs.com: Monograph: ... Ergocalciferol, also known as vitamin D 2 and nonspecifically calciferol, is a type of vitamin D found in food.

  5. Vitamin D analogues - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D_analogues

    The natural, active form of vitamin D is calcitriol (1,25-dihydroxycholecalciferol). This molecule and other naturally occurring forms of vitamin D, including its precursors and metabolites, have been modified to synthesize pharmaceuticals with potentially greater, or selective, therapeutic actions. [1] [2] [3] [4]

  6. Calcitriol - Wikipedia

    en.wikipedia.org/wiki/Calcitriol

    Calcitriol was identified as the active form of vitamin D in 1971 and the drug was approved for medical use in the United States in 1978. [7] It is available as a generic medication . [ 12 ] In 2022, it was the 254th most commonly prescribed medication in the United States, with more than 1 million prescriptions.

  7. Calcifediol - Wikipedia

    en.wikipedia.org/wiki/Calcifediol

    Calcifediol binds in the blood to vitamin D-binding protein (also known as gc-globulin) and is the main circulating vitamin D metabolite. [4] [5] Calcifediol has an elimination half-life of around 15 to 30 days. [4] [9] Calcifediol is further hydroxylated at the 1-alpha-position in the kidneys to form 1,25-(OH) 2 D 3, calcitriol.

  8. AOL.com - My AOL

    www.my.aol.com

    AOL latest headlines, news articles on business, entertainment, health and world events.

  9. Calcium/cholecalciferol - Wikipedia

    en.wikipedia.org/wiki/Calcium/Cholecalciferol

    It is used to prevent and treat lack of calcium and vitamin D in the elderly, as well for osteoporosis in combination with other medications. [1] [2] In 2022, the combination, calcium/vitamin D was the 246th most commonly prescribed medication in the United States, with more than 1 million prescriptions. [3] [4]