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大量流行病学研究表明,膳食中的抗氧化营养素(如,抗坏血酸、β-胡萝卜索、维生素E和硒等)摄入量与几种主要慢性疾病(如,心脑血管病、某些癌症、糖尿病等)呈显著的负相关。这些研究涉及横断面、病例一对照和前瞻性研究,而且不同研究之间的结果相当一致,相反的结果很少。因此,这些抗氧化营养素对于这些疾病的保护作用已得到普遍认同。并见诸于各种教科书和参考书。然而,这些研究结果均不是直接的证据;因为,流行病学研究中这些抗氧化营养素的摄入量数据均是由各种食物的摄入量结合这
Numerous epidemiological studies have shown that the intake of antioxidants (eg, ascorbic acid, beta-carrot cord, vitamin E and selenium, etc.) in the diet correlates with several major chronic diseases (eg, cardiovascular disease, certain cancers, Diabetes, etc.) showed a significant negative correlation. These studies involved cross-sectional, case-control, and prospective studies, and the results between the different studies were fairly consistent with few results. Therefore, the protective effect of these antioxidant nutrients on these diseases has been generally recognized. And found in a variety of textbooks and reference books. However, none of these findings are direct evidence because the data on the intake of these antioxidant nutrients in epidemiological studies are all based on the intake of various foods