从自由基学说看水果蔬菜的抗衰老作用

自由基引起的氧化损伤是引起机体老化及多种老年病的主要因素。大量流行病学研究表明，经常食用水果及黄绿色蔬菜能够预防多种与增龄有关的退行性病变。推测其作用机理可能与蔬菜水果中所含的抗氧化成份有关。但是，有研究表明，通过补充已知的抗氧化营养素如ＶＣ、ＶＥ和β—胡萝卜素不能达到预期的效果，因此还需要进一步加强水果蔬菜中抗氧化成分的研究，尤其是要关注过去未给予充分重视的某些成分及其可能的重要作用，此外还应加强对延寿和改善机体功能方面的研究。

Free-radical theory and the antisenescence effect of fruits and vegetables

Oxidative damage resulting from free radical is a major cause of ageing and chronic degenerative disease. Epidemiological studies show that frequent consumption of fruit and yellow or green leafy vegetables may prevent many kinds of chronic degenerative diseases associated with the increasing of age. These may be related with the anti-oxidative ingredients in fruit and vegetables. Nevertheless, trials using anti-oxidative nutrient, such as vitamin C, E and beta-carotene supplements, did not get the expected result so far. Thus, it is necessary to strengthen the research on the potential effective anti-oxidative ingredients in fruit and vegetables. On the other hand, the study on the effect of fruit and vegetables on life span and improving life quality are also needed.