论文部分内容阅读
目的 :了解农村中学生补充维生素A、β-胡萝卜素前后的血清变化 ,评价补充效果。 方法 :选取 82名农村中学生补充维生素A和 β-胡萝卜素 ,并测定血清中维生素A、β -胡萝卜素的含量。 结果 :农村中学生维生素A、β-胡萝卜素本底水平分别为 (32 3 .1± 90 .4) μg/L和 (356 .0± 81 .4)mg/L。每天补充 2mg和 6mgβ-胡萝卜素 ,6周后效果相同。而补充维生素A组血清水平高于补β -胡萝卜素组。 结论 :长期每天摄入 4mgβ-胡萝卜素能基本保证中学生生理情况下对维生素A的营养要求 ,同时也说明富含维生素A的动物性食品在维生素A营养中的重要性
Objective: To understand the serum levels of vitamin A and β-carotene in rural middle school students before and after the supplementation. Methods: 82 rural middle school students were recruited to take vitamin A and β - carotene, and the content of vitamin A and β - carotene in serum was determined. Results: The background levels of vitamin A and β-carotene in rural middle school students were (32 3 ± 90.4) μg / L and (356.0 ± 81.4) mg / L, respectively. Daily 2mg and 6mg β-carotene supplementation, 6 weeks after the same effect. However, serum vitamin A supplementation was higher than that of β - carotene. Conclusion: Long-term daily intake of 4mg β-carotene can basically guarantee the physiological requirements of middle school students on vitamin A nutrition requirements, but also shows that the vitamin A-rich animal foods in the vitamin A nutrition importance