Section 60
Chapter 59,249

Vitamin e status of 20- to 59-year-old adults living in the Seoul metropolitan area of South Korea

Kim, Y.-N.; Cho, Y.-O.

Nutrition Research and Practice 9(2): 192-198


ISSN/ISBN: 1976-1457
PMID: 25861427
DOI: 10.4162/nrp.2015.9.2.192
Accession: 059248946

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Vitamin E is a fat-soluble vitamin and functions primarily as a lipid antioxidant. Inadequate vitamin E status may increase risk of several chronic diseases. Thus, the objectives of this study were to estimate intake and plasma concentration of each tocopherol and to evaluate vitamin E status of Korean adults. Three consecutive 24-h food recalls and fasting blood samples were collected from healthy 20- to 59-y-old adults (33 males and 73 females) living in the Seoul metropolitan area, South Korea. α-, β-, δ-, and γ-tocopherol intakes and plasma concentrations of tocopherols (α-, δ-, and γ-tocopherol) were analyzed by gender. Dietary vitamin E and total vitamin E intake (dietary plus supplemental vitamin E) was 17.68 ± 14.34 and 19.55 ± 15.78 mg α-tocopherol equivalents, respectively. The mean daily α-tocopherol, and γ-tocopherol intakes were 3.07 ± 2.27 mg and 5.98 ± 3.74 mg, respectively. Intakes of total vitamin E and each tocopherol of males were significantly higher than those of females (P < 0.05). Plasma α-tocopherol concentration was 15.45 ± 10.16 of males and 15.00 ± 4.54 µmol/L of females, respectively. There were no significant differences in plasma tocopherol concentrations by gender (P ≥ 0.05). Plasma α-tocopherol was negatively correlated with γ-tocopherol intake (P < 0.05). Twenty-three percent of the subjects had plasma α-tocopherol concentrations < 12 µmol/L indicating a biochemical deficiency of vitamin E. Approximately 8% and 9% of these participants had plasma α-tocopherol:total lipid ratio less than 1.59 µmol/mmol and plasma α-tocopherol:total cholesterol ratio less than 2.22 µmol/mmol, respectively, which are also indicative of vitamin E deficiency. Vitamin E intakes of Korean adults were generally adequate with the Korean Dietary Reference Intakes for vitamin E. However, α-tocopherol intake was lower than that reported in other countries, and 23% of the subjects in the current study were vitamin E deficient based on plasma α-tocopherol concentrations.

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