from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A dihydroxy- derivative of vitamin D2 that occurs in some plants


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  • While plants typically stop at ergocalciferol in their own metabolism of vitamin D2, humans who consume vitamin D2 in plant form can take the ergocalciferol and convert it (once again using the liver and the kidneys) into 1,25-dihydroxyergocalciferol, or ercalcitriol.

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  • In the past, these two forms of vitamin D (calcitriol originating in animals, and ercalcitriol originating in plants) - were not carefully differentiated in research studies or in the manufacture of vitamin D supplements.

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  • More recently, however, we believe that ercalcitriol has clearly been shown to be an inferior form of vitamin D when it comes to vitamin supplements.

    The World's Healthiest Foods


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