{"meta":{"id":"https:\/\/api.iclient.ifeng.com\/ipadtestdoc?aid=ucms_80P4llliKvV","type":"doc","o":"1","documentId":"ucms_80P4llliKvV"},"body":{"newStatus":"1","documentId":"ucms_80P4llliKvV","staticId":"ucms_80P4llliKvV","title":"营养素的故事(1)——能量、食物与营养素","shareTitle":"营养素的故事(1)——能量、食物与营养素","thumbnail":"http:\/\/d.ifengimg.com\/w150_h106_q100\/img1.ugc.ifeng.com\/newugc\/20201008\/17\/wemedia\/1e2eb7706780427da49e449468fe00b34a7a5554_size52_w496_h330.jpeg","source":"","author":"","editorcode":"weMedia","editTime":"2020-10-09 07:00:00","updateTime":"2020\/10\/09 07:00:00","wapurl":"http:\/\/\/\/feng.ifeng.com\/c\/80P4llliKvV","introduction":"","wwwurl":"http:\/\/\/\/feng.ifeng.com\/c\/80P4llliKvV","commentsUrl":"ucms_80P4llliKvV","commentCount":0,"text":"
食物里包含有很多物质,有的具有营养作用,有的具有药用作用,有的则可能有毒副作用。其中,那些可以给人提供能量、提供维持人类生命活动所必需的有益物质,即食物中对人体具有营养功能的物质被称为“营养素”,包括蛋白质、脂类、碳水化合物、矿物质、维生素、水 6大类。<\/p>
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蛋白质、脂类和碳水化合物因为需求量多,每天从食物中摄取的量也多,被称为“宏量营养素”,矿物质、维生素的需求量相对较少,每天从食物中摄取的也较少,被称为“微量营养素”。目前已证实人类必需的营养素有40余种,这些营养素大多可以通过食物摄取。<\/p>
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能量是人类赖以生存和生命活动的基础。生命的维持、生长发育和身体活动都离不开能量,如同汽车在马路上行驶离不开汽油一样。能量来源于日常所吃的各种食物中,而食物中只有三种营养素可以提供能量——碳水化合物、蛋白质和脂肪。<\/p>
《中国居民膳食营养素参考摄入量(2013)》中强调,人的年龄、性别、劳动强度不同,能量需求量也不同。<\/p>
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身体活动水平如何判断呢?<\/p>
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对照一下,看看自己一天需要多少能量吧。<\/p>","img":[{"url":"http:\/\/d.ifengimg.com\/mw640_q100\/img1.ugc.ifeng.com\/newugc\/20201008\/17\/wemedia\/59af2d22b4bf284dd03b41729a8a7b1f352a76c7_size36_w640_h640.jpeg","size":{"width":"640","height":"640"}},{"url":"http:\/\/d.ifengimg.com\/mw640_q100\/img1.ugc.ifeng.com\/newugc\/20201008\/17\/wemedia\/dd8797693681e2255a733ef515f77c9d89c249be_size405_w620_h418.png","size":{"width":"620","height":"418"}},{"url":"http:\/\/d.ifengimg.com\/mw640_q100\/img1.ugc.ifeng.com\/newugc\/20201008\/17\/wemedia\/ab54a0bac06b96795fd8d5671839bee9ea8e3db8_size2396_w693_h883.png","size":{"width":"640","height":"815"}},{"url":"http:\/\/d.ifengimg.com\/mw640_q100\/img1.ugc.ifeng.com\/newugc\/20201008\/17\/wemedia\/b19860a0e706a8dbb4018ea5602a11d8c190cec2_size736_w693_h271.png","size":{"width":"640","height":"250"}}],"summary":"食物里包含有很多物质,有的具有营养作用,有的具有药用作用,有的则可能有毒副作用。其中,那些可以给人提供能量、提供维持人类生命活动所必需的有益物质,即食物中对人体","sharesummary":"食物里包含有很多物质,有的具有营养作用,有的具有药用作用,有的则可能有毒副作用。其中,那些可以给人提供能量、提供维持人类生命活动所必需的有益物质,即食物中对人体","commentType":"0","wemediaEAccountId":"1588634","showclient":"0","shareurl":"https:\/\/ishare.ifeng.com\/c\/s\/v002vLcbBWTfha0HFinuRDFYCHx9LTUVhFYU02x6gE3dOlw__","praise":"0","like_num":"0"}}