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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
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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[edit]

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[edit]

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

Dietary sources[edit]

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


  1. ^ a b c Li C, Ford ES, Zhao G, Balluz LS, Giles WH, Liu S (March 2011). "Serum α-carotene concentrations and risk of death among US Adults: the Third National Health and Nutrition Examination Survey Follow-up Study". Arch. Intern. Med. 171 (6): 507–15. doi:10.1001/archinternmed.2010.440. PMID 21098341. [Those With High Alpha-Carotene Blood Levels Live Much Longer Lay summary] Check |url= scheme (help)Medical News Today (22 November 2010). 
  2. ^ Alpha-carotene Linked to Lower Mortality Rates , Tufts Health and Nutrition Letter, March 2011