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7488-99-5 N
ChEBI CHEBI:28425 YesY
ChemSpider 3571861 YesY
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PubChem 6419725
Molar mass 536.873
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α-Carotene is a form of carotene with a β-ionone ring at one end and an α-ionone ring at the opposite end. It is the second most common form of carotene.

Human physiology

In United States adults and Chinese adults the mean concentration of serum α-carotene was 4.71 µg/dL, including 4.22 µg/dL among men and 5.31 µg/dL among women (to convert to micromoles per liter, multiply by 0.01863).[1]

Health effects

Dietary intake affects blood levels of α-carotene, which in one study was associated with significantly lower risk of premature death.[1][2]

Dietary sources

The following vegetables are rich in alpha-carotene:[1]


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  2. Alpha-carotene Linked to Lower Mortality Rates , Tufts Health and Nutrition Letter, March 2011