Provitamin: Difference between revisions

(3 intermediate revisions by the same user not shown)

Line 1:

{{Short description|Substances animals can metabolize into vitamins}}

A '''provitamin''' is a substance that may be converted within the body to a [[vitamin]]. The term '''previtamin''' is a synonym.

The term "provitamin" is used when it is desirable to label a substance with little or no vitamin activity, but which can be converted to an active form by normal [[metabolism|metabolic]] processes.

==Example==

==Example==

Some provitamins are:

* "Provitamin A" is a name for [[Beta-Carotene|β-carotene]],~~<ref name=pro/>~~ which has only about 1/6 the [[biological activity]] of [[retinol]] ([[vitamin A]]); the body uses an [[enzyme]] to convert β-carotene to retinol. In other contexts, both β-carotene and retinol are simply considered to be different forms ([[vitamer]]s) of vitamin A.

* "Provitamin A" is a name for [[Beta-Carotene|β-carotene]], which has only about 1/6 the [[biological activity]] of [[retinol]] ([[vitamin A]]); the body uses an [[enzyme]] to convert β-carotene to retinol. In other contexts, both β-carotene and retinol are simply considered to be different forms ([[vitamer]]s) of vitamin A.

* "Provitamin B5" is a name for [[panthenol]], which may be converted in the body to vitamin B5 ([[pantothenic acid]]).

* [[Menadione]] is a synthetic provitamin of [[vitamin K]].

* Provitamin [[vitamin D|D2]] is [[ergosterol]], and provitamin D3 is [[7-dehydrocholesterol]]. They are converted by UV light into vitamin D.~~<ref name=pro/>~~ The human body produces provitamin D3 naturally; deficiency is usually caused by a lack of sun exposure, not a lack of the provitamin.

* Provitamin [[vitamin D|D2]] is [[ergosterol]], and provitamin D3 is [[7-dehydrocholesterol]]. They are converted by UV light into vitamin D. The human body produces provitamin D3 naturally; deficiency is usually caused by a lack of sun exposure, not a lack of the provitamin.

==External links==

==External links==

*[https://deerforia.com/ Vitamin Gummies]

[[Category:Vitamins]]

</translate>

@@ Line 1: / Line 1: @@
+<languages />
+<translate>
+<!--T:1-->
 {{Short description|Substances animals can metabolize into vitamins}}
 A '''provitamin''' is a substance that may be converted within the body to a [[vitamin]]. The term '''previtamin''' is a synonym.
+<!--T:2-->
 The term "provitamin" is used when it is desirable to label a substance with little or no vitamin activity, but which can be converted to an active form by normal [[metabolism|metabolic]] processes.
-==Example==
+==Example== <!--T:3-->
 Some provitamins are:
-* "Provitamin A" is a name for [[Beta-Carotene|β-carotene]],<ref name=pro/> which has only about 1/6 the [[biological activity]] of [[retinol]] ([[vitamin A]]); the body uses an [[enzyme]] to convert β-carotene to retinol. In other contexts, both β-carotene and retinol are simply considered to be different forms ([[vitamer]]s) of vitamin A.
+<!--T:4-->
+* "Provitamin A" is a name for [[Beta-Carotene|β-carotene]], which has only about 1/6 the [[biological activity]] of [[retinol]] ([[vitamin A]]); the body uses an [[enzyme]] to convert β-carotene to retinol. In other contexts, both β-carotene and retinol are simply considered to be different forms ([[vitamer]]s) of vitamin A.
 * "Provitamin B5" is a name for [[panthenol]], which may be converted in the body to vitamin B<sub>5</sub> ([[pantothenic acid]]).
 * [[Menadione]] is a synthetic provitamin of [[vitamin K]].
-* Provitamin [[vitamin D|D<sub>2</sub>]] is [[ergosterol]], and provitamin D<sub>3</sub> is [[7-dehydrocholesterol]]. They are converted by UV light into vitamin D.<ref name=pro/> The human body produces provitamin D<sub>3</sub> naturally; deficiency is usually caused by a lack of sun exposure, not a lack of the provitamin.
+* Provitamin [[vitamin D|D<sub>2</sub>]] is [[ergosterol]], and provitamin D<sub>3</sub> is [[7-dehydrocholesterol]]. They are converted by UV light into vitamin D. The human body produces provitamin D<sub>3</sub> naturally; deficiency is usually caused by a lack of sun exposure, not a lack of the provitamin.
-==External links==
+==External links== <!--T:5-->
 *[https://deerforia.com/ Vitamin Gummies]
+<!--T:6-->
 {{二次利用|date=5 December 2023}}
 [[Category:Vitamins]]
+</translate>