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为什么要提倡平衡膳shi?

本站新(短)域名:xiguashuwu.com

为什么要提倡平衡膳食?

所谓平衡膳食,就是所吃食wuzhong类要齐全、数量要充足,以互相取长补短。juti地说,平衡膳食要求每天保证应有cu细粮搭pei的主食,鱼、rou、dan、nai、豆类,绿se或黄红se蔬菜和新鲜水果类,烹调用油及其他调味品几大类食wu。因为人的生命活动、新陈代谢,需要zhong类繁多的营养素,如组织修复需dan白质,制造红细胞需dan白质、铁、铜等wu质。而不同的食wuhan有不同的营养素,单单依靠任何一zhong食wu,所han有的营养成分都是无法满足人ti需要的。例如,jidan虽然han有丰富的dan白质,但不han维生素C;蔬菜han维生素和矿wu质较多,但提供的热量太少;niunaihandan白质、铝较多,但han铁不足。所以各类食wu都要吃,而且比例要适当,真正zuo到平衡膳食,增进健康。

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