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美研究称减肥食品未必健康 或损伤肝脏和大脑

2017-04-30 13:11:04   新华网

原标题:美研究称减肥食品未必健康 或损伤肝脏和大脑

多数减肥食品不含脂肪或仅含少量脂肪,不少人将它等同于健康食品。但美国一项研究显示,这完全是误解。事实上,很多减肥食品含糖量高,不仅无助于减肥,还会损伤肝脏和大脑等器官。

佐治亚大学研究人员在荷兰最新一期《活动与生理》期刊上刊文说,他们将小鼠分为三组,分别喂食高脂高糖食品、低脂高糖食品和均衡饮食,4周内监测它们的体重、摄取热量、身体组成和粪便样本等数据。

结果显示,代表减肥食品的低脂高糖组转化体脂的效能是均衡饮食组的两倍多。换言之,要生成同样数量的体脂,低脂高糖组需要的热量不足均衡饮食组的一半。

研究人员还发现,与均衡饮食组相比,另两组小鼠肝脏脂肪增加,体重大幅上升。其中,低脂高糖组肝脂蓄积情况尤为明显,而肝脂蓄积能导致非酒精性脂肪肝,进而损伤肝脏。另外,高脂高糖和低脂高糖饮食均能引发肠道和脑部慢性炎症。而这些研究人员先前发现,脑部炎症会破坏关联肠道的迷走神经,让大脑无法正常辨别是否饱腹,进而造成过量饮食。(新华社微特稿)(王鑫方)

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