A provitamin is a substance that may be converted within the body to a vitamin. Dictionary definition of provitamin. Referenced 2014-02-05 The term previtamin is a synonym.Dictionary definition of previtamin. Referenced 2014-02-05 For example, "Provitamin B5" is a name for panthenol, which may be converted in the body to vitamin B5 (pantothenic acid). 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 metabolic processes. For example, " provitamin A" is a name for 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 (vitamers) of vitamin A. Provitamin D2 is ergosterol, and provitamin D3 is 7-dehydrocholesterol. Menadione is a synthetic provitamin of vitamin K .
A provitamin is a substance that may be converted within the body to a vitamin. Dictionary definition of provitamin. Referenced 2014-02-05 The term previtamin is a synonym.Dictionary definition of previtamin. Referenced 2014-02-05 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 metabolic processes. Some provitamins are: " Provitamin A" is a name for 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 (vitamers) 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 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 .
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For example, "Provitamin B5" is a name for panthenol, which may be converted in the body to vitamin B5 (pantothenic acid).
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For example,
Some provitamins are:
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provitamin
Provitamin
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Provitamin
"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
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Menadione is a synthetic provitamin of vitamin K
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