摘要 : The objective of the study was to examine the relationship between dietary intake and plasma concentrations of carotenoids, tocopherols, and vitamin C in young to middle-aged nonsupplemented women and men as well as evaluate their... 展开 The objective of the study was to examine the relationship between dietary intake and plasma concentrations of carotenoids, tocopherols, and vitamin C in young to middle-aged nonsupplemented women and men as well as evaluate their vitamin E and vitamin C status. Subjects included young(19-24 y) and middle-aged (25-50 y) men and women. The four age x gender groups had similar dietary intakes of beta -carotene, alpha -carotene, cryptoxanthin, lycopene, lutein, vitamin E, and vitamin C. These four groups also had similar plasma beta -carotene, cryptoxanthin, lycopene, alpha -tocopherol,;md vitamin C concentrations. The percentage of each group having low (<20 <mu>mol/L) plasma vitamin E levels were: young females, 81%; middle-aged females, 63%; young males, 83%; and middle-aged males, 64%. All subjects but one had plasma vitamin C levels indicative of adequacy. Overall, 72% of subjects had less than acceptable vitamin E status, and 48% reported consuming less than the Estimated Average Requirement for the vitamin. 收起