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限食就是限制饮食,只吃七八分饱。关于用限食来延长动物寿命的研究工作是从30年代开始的。但是这类研究曾经被视为“实验室里的古玩”。近年来,限制饮食的研究已引起人们广泛的关注。限食可以长寿是有其理论基础的。科学家们用给够各种营养,但热量只有常规膳食的60％～65％的方法饲养动物,从其器官健康状况、免疫系统健全性、皮毛光泽度来看,比按照常规喂养的动物要好得多。限食喂养的老鼠可活到55个月,而常规喂养的老鼠其平均寿命只有36个月。
Food restriction is to limit the diet, eat only seventy-eight full. Research on the use of food to extend the life of animals began in the 1930s. But such studies were once considered “antiques in the lab.” In recent years, the study of diet restriction has aroused widespread concern. Longevity can have its theoretical basis. Scientists use animals that feed 60% to 65% of their diets, which are nutritious but have only a regular calorie diet, which are better than those fed conventional animals in terms of their organ health, immune system integrity, and luster of the fur many. Rats fed diets lived for 55 months, whereas mice fed conventional diets had an average life span of 36 months.