Ergocalciferol is produced in fungi synthetically through irradiation of ergosterol.
2.
Ergosterol is a photochemical reaction that converts ergosterol to ergocalciferol.
3.
It is a synthetic analog of ergocalciferol ( vitamin D 2 ).
4.
Vitamin D2, or ergocalciferol, is obtained from various food sources including milk and fish.
5.
Ergocalciferol ( D2 ) is derived from ergosterol from UV-exposed mushrooms or yeast and is suitable for vegans.
6.
Marketed by Abbott Laboratories under the trade name "'Zemplar "') is a vitamin D 2 ( ergocalciferol ).
7.
The ergocalciferol, vitamin D 2, in UV-irradiated mushrooms is not the same nutritional supplements, vitamin D 3 is often used in dairy and cereal products.
8.
The two major forms are vitamin D 2 or ergocalciferol, and vitamin D 3 or cholecalciferol; vitamin D without a subscript refers to either D 2 or D 3 or both.
9.
There are conflicting reports concerning the absorption of cholecalciferol ( D 3 ) versus ergocalciferol ( D 2 ), with some studies suggesting less efficacy of D 2, and others showing no difference.
10.
Ergocalciferol ( vitamin D 2 ) is converted in the liver to 25-hydroxyergocalciferol ( a . k . a . 25-hydroxyvitamin D 2 abbreviated 25 ( OH ) D 2 ).
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