beta-carotene

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beta-carotene

vitamin

Also known as: provitamin A

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conjugated bonds responsible for colour

In chemical compound: Ultraviolet and visible (UV-visible) spectroscopy
…bright orange colour of carrots, β-carotene, contains 11 conjugated π bonds. UV-visible spectroscopy is especially informative for molecules that contain conjugated π bonds.
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distribution

In vitamin: Sources
…tissues or species; for example, beta-carotene, which can be converted to vitamin A, is synthesized in plant tissues but not in animal tissues. On the other hand, vitamins A and D₃ (cholecalciferol) occur only in animal tissues. Both plants and animals are important natural vitamin sources for human beings. Since…
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vitamin A source

In vitamin A
…of these pigments, beta-carotene (provitamin A) is an excellent source of vitamin activity. The existence of vitamin A was first clearly recognized in 1913, its chemical nature was established in 1933, and it was first synthesized in 1947.
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