. "8 •-Carotene and Other Carotenoids." Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, DC: The National Academies Press, 2000.
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DRI DIETARY REFERENCE INTAKES FOR Vitamin C, Vitamin E, Selenium, and Carotenoids
TABLE 8-3 Concentrations of β-Carotene and Total Carotenoids in Plasma or Serum Associated with a Lower Risk of Various Health Outcomes in Selected Studies
a Concentration in the quartile/quantile where the risk reduction was of the greatest magnitude. For studies that only report mean or median concentrations in the diseased and disease-free groups, the concentration is the level in the group that remained free of disease. SI Conversion factor used for β-carotene and total carotenoids = 0.01863 µg/dL to µmol/L, with the exception of Greenberg et al., 1996.
mortality in U.S. adults. Note that these blood concentrations reflect levels in the absence of supplementation with β-carotene. Thus, this prospective study emphasizes the inverse association between β-carotene-rich foods and the risk of all-cause mortality.
Another cohort study of carotenoids and mortality examined both dietary intake of total carotenoids and plasma concentrations of
