the active form of vitamin d, also known as a hormone, is called calcitriol.
the active form of vitamin d, also known as a hormone, is called calcitriol.
the active form of vitamin d also known as a hormone is called?
calcitriol
vitamin d from the diet, or from skin synthesis, is biologically inactive. a protein enzyme must hydroxylate it to convert it to the active form. this is done in the liver and in the kidneys. as vitamin d can be synthesized in adequate amounts by most mammals exposed to sufficient sunlight, it is not an essential dietary factor, and so not technically a vitamin. instead it could be considered a hormone, with activation of the vitamin d pro-hormone resulting in the active form, calcitriol, which then produces effects via a nuclear receptor in multiple locations.
vitamin d
vitamin d (the inactive version) is mainly from two forms: vitamin d3 and vitamin d2. vitamin d3, or cholecalciferol, is formed in the skin after exposure to sunlight or ultra violet radiation or from d3 supplements or fortified food sources. vitamin d2, or ergocalciferol, is obtained from d2 supplements or fortified food sources. these two forms of vitamin d are metabolized in the liver and stored as 25-hydroxyvitamin d. before biological use, the storage form must be converted into an active form. one common active form is 1,25 dihydroxyvitamin d. the term "vitamin d" in this article, refers to group of molecules including cholecalciferol, ergocalciferol, 25-hydroxyvitamin d, and the active forms. the role of vitamin d is best characterized as enabling calcium absorption and regulating calcium homeostasis. vitamin d also play a role in phosphate absorption.
vitamin d and neurology