プロビタミン

プロビタミン（provitamin）（provitamin）は、体内でビタミンに変換される可能性のある物質である。プレビタミン(previtamin)という用語は同意語である。

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.

Example

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.

External links

• Vitamin Gummies