Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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).
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The following vegetables are rich in alpha-carotene:
- Yellow-orange vegetables : Carrots (the main source for U.S. adults), Sweet potatoes, Pumpkin, Winter squash
- Dark-green vegetables : Broccoli, Green beans, Green peas, Spinach, Turnip greens, Collards, Leaf lettuce, Avocado
- 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] – Medical News Today (22 November 2010).
- Alpha-carotene Linked to Lower Mortality Rates , Tufts Health and Nutrition Letter, March 2011
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