enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Vitamin D - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D

    The conversion from ergosterol to vitamin D 2 follows a similar procedure, forming previtamin D 2 by photolysis, which isomerizes to vitamin D 2 (ergocalciferol). [165] The transformation of previtamin D 2 to vitamin D 2 in methanol has a rate comparable to that of previtamin D 3 .

  3. CYP2R1 - Wikipedia

    en.wikipedia.org/wiki/CYP2R1

    The conversion of vitamin D, especially cholecalciferol, to 25(OH)D (calcifediol) is one of the key steps in the vitamin D hormonal system. The CYP2R1 enzymatic activity achieving this process was previously thought to be constitutively expressed and stable, so that serum 25(OH)D was a measure of the supply of vitamin D. [9]

  4. File:Vitamin D synthesis metabolism pathway WikiPathways ...

    en.wikipedia.org/wiki/File:Vitamin_D_synthesis...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate; Pages for logged out editors learn more

  5. Cholecalciferol - Wikipedia

    en.wikipedia.org/wiki/Cholecalciferol

    Cholecalciferol is a form of vitamin D which is naturally synthesized in skin and functions as a pro-hormone, being converted to calcitriol. This is important for maintaining calcium levels and promoting bone health and development. [4] As a medication, cholecalciferol may be taken as a dietary supplement to prevent or to treat vitamin D ...

  6. Previtamin D3 - Wikipedia

    en.wikipedia.org/wiki/Previtamin_D3

    Previtamin D 3 is an intermediate in the production of cholecalciferol (vitamin D 3). It is formed by the action of UV light, most specifically UVB light of wavelengths between 295 and 300 nm, acting on 7-dehydrocholesterol in the epidermal layers of the skin. [1] [2] [3] The B ring of the steroid nucleus structure is broken open, making a ...

  7. 7-Dehydrocholesterol - Wikipedia

    en.wikipedia.org/wiki/7-Dehydrocholesterol

    7-Dehydrocholesterol (7-DHC) is a zoosterol that functions in the serum as a cholesterol precursor, and is photochemically converted to vitamin D 3 in the skin, therefore functioning as provitamin-D 3. The presence of this compound in human skin enables humans to manufacture vitamin D 3 (cholecalciferol).

  8. 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.

  9. 24,25-Dihydroxycholecalciferol - Wikipedia

    en.wikipedia.org/wiki/24,25-Dihydroxycholecalciferol

    24,25-Dihydroxycholecalciferol, also known as 24,25-dihydroxyvitamin D 3 and (24R)-hydroxycalcidiol (abbreviated as 24(R),25-(OH) 2 D 3), [1] is a compound which is closely related to 1,25-dihydroxyvitamin D 3, the active form of vitamin D 3. Like vitamin D 3 itself and calcifediol (25-hydroxyvitamin D 3), it is inactive as a hormone both in ...