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Title: Alpha-Carotene  
Author: World Heritage Encyclopedia
Language: English
Subject: Vitamin A, Carotene, Beta-Carotene, Carotenoids, Retinol
Collection: Carotenoids, Tetraterpenes
Publisher: World Heritage Encyclopedia


Skeletal formula
Space-filling model
ChemSpider  Y
Jmol-3D images Image
Molar mass 536.873
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 N  (: Y/N?)

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 1
  • Health effects 2
  • Dietary sources 3
  • References 4

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 death.[1][2]

Dietary sources

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

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