期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：2001
卷号：47
期号：1
页码：20-27
DOI：10.3177/jnsv.47.20
出版社：Center for Academic Publications Japan
摘要：To investigate the vitamin status of young Japanese women, dietary intakes of vitamin A, E, C, B1, B2, B6, B12, niacin, folate, and β-carotene were assessed by a 3-d weighed food record in 150 female students aged 21-22. Whole blood levels of vitamin B1, B2, and nicotinic acid, and serum levels of retinol, α-tocopherol, vitamin B6, and β-carotene were determined by HPLC. Vitamin B12 and folate in serum were measured by chemilumi-nescence immunoassay, and serum vitamin C was done by dinitrophenylhydrazine method. When the 6th revision RDAs for the Japanese (physical activity level I) were applied, 46.7% of the females showed sufficient intake for vitamin A, 28.7% for E, 80.7% for B1, 92.7% for B2, 54.7% for B6, 99.3% for niacin, 76.0% for B12, 34.0% for folate, and 54.0% for C. Fifty-nine percent of total vitamin A (μgRE) intakes were derived from β-carotene. The mean ±SD of energy intakes was low, 1, 572±315 kcal. Significant correlations among intakes of en-ergy and all these vitamins were found. Serum folate and ascorbic acid levels in the females with corresponding vitamin intakes above the RDA were significantly higher than in those with intakes below the RDA. There were significant correlations between blood vitamin lev-els and vitamin intakes in vitamin B12 ( r =0.185), folate ( r =0.255), vitamin C ( r =0.272), and β-carotene ( r =0.319). Mean blood levels of folate, ascorbic acid, vitamin B2, B12, and β-carotene were higher in the highest quartile of intake than in the lowest. The 95% confi-dence intervals of blood vitamin levels obtained from the females with sufficient vitamin in-takes were nearly equal to those obtained from all subjects. Only a few females (0.7-4.7%) had their blood vitamin levels below the lower limits. Serum α-tocopherol levels were signif-icantly correlated with serum levels of retinol, β-carotene, and vitamin C. This data sug-gested that young women should increase suitable dietary food intakes in order to maintain good status of vitamin. Moreover, sufficient amount of physical activity would be expected for prevention of excessive energy intake.
