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[目的]了解大学生维生素A营养状况,为指导学生合理营养提供科学依据。[方法]采用记账法与24h膳食回顾法、称重法相结合的方法对兰州市332名志愿参加营养调查的医学生进行连续3d的膳食调查,同时采用暗适应仪测定学生暗适应时间,并用高效液相色谱仪测血清维生素A。[结果]男、女生膳食中维生素A每日摄入量分别为468.0μg和视黄醇当量(RE)450.0μg,有41.8%～47.0%的人维生素A摄入量不足推荐摄入量(RNI)的60%;有35.3%的人暗适应时间延长;血清维生素A测定显示,亚临床维生素A缺乏者占3.4%。[结论]学生维生素A的营养水平有待提高,应给予系统的营养指导,结合必要的营养强化补充。
[Objective] To understand the nutritional status of vitamin A in college students and provide a scientific basis for guiding students in their rational nutrition. [Methods] 332 consecutive volunteers who participated in nutrition survey in Lanzhou were enrolled in the dietary survey for three consecutive days using the method of accounting and 24-hour dietary review and weighing method. Meanwhile, the dark adaptation time was used to determine the dark adaptation time of students, High Performance Liquid Chromatography Serum Vitamin A. [Results] The daily intakes of vitamin A in males and females were 468.0 μg and 450.0 μg respectively, and 41.8% -47.0% of them had insufficient intake of vitamin A (RNI) ) 60%; 35.3% of people dark adaptation time extension; serum vitamin A assay showed that subclinical vitamin A deficiency accounted for 3.4%. [Conclusion] The nutritional level of vitamin A in students needs to be improved. The systematic nutritional guidance should be given, combined with the necessary nutritional supplements.