Total α-tocopherol intakes are associated with serum α-tocopherol concentrations in African American adults

Abstract

African Americans in the southern United States have a high prevalence of chronic disease. Tocopherol intake and status have been associated with protection against several chronic diseases. Our objectives were, therefore, to examine the association between tocopherol intakes as measured by 2 regional FFQ and their corresponding concentrations in serum and to report on dietary sources of tocopherols in 404 men and women participating in the cross-sectional Diet and Physical Activity Sub-Study of the Jackson Heart Study. A large proportion (49% of men and 66% of women) reported dietary supplement use. Only 5.8% of men and 4.5% of women met the estimated average requirement (EAR) for vitamin E from foods alone, whereas 44.2% men and 49.2% women met it from foods and supplements. Total (diet + supplement) intake of α-tocopherol was associated with its corresponding measure in serum. Vitamin E supplement use, sex, serum cholesterol, education, and BMI, but not γ-tocopherol intakes, were associated with serum γ-tocopherol. For δ-tocopherol, associated variables included sex and serum cholesterol. The top food sources of α- and γ-tocopherol were snack chips and the top food source of δ-tocopherol was margarine. Despite prevalent vitamin E supplement use, more than one-half of this population did not meet the EAR for α-tocopherol intake and very few met it from food alone. Supplement use was associated with higher α- but lower γ-tocopherol concentration in serum. The possible health implications of this difference in relative tocopherol subtypes require further study. © 2007 American Society for Nutrition.