Up until just a few hundred years ago, concentrated sugars were essentially absent from the human diet — besides, perhaps, the fortuitous find of small quantities of wild honey. Sugar would have been a rare source of energy in the environment, and strong cravings for it would have benefited human survival. Sugar cravings would have prompted searches for sweet foods, the kind that help us layer on fat and store energy for times of scarcity.
直 到几百年前,浓缩糖实际上在人类的饮食中还不存在,除非偶然间找到少量野生蜂蜜。糖分在环境中是一种罕见的能量来源,对其产生强烈的渴望,对于人类的生存 是有利的。对糖分的渴求会促使我们寻找甜味的食物,也就是帮助我们堆积脂肪、积蓄能量,以备匮乏时期的那种食物。
Today added sugar is everywhere, used in approximately 75 percent of packaged foods purchased in the United States. The average American consumes anywhere from a quarter to a half pound of sugar a day. If you consider that the added sugar in a single can of soda might be more than most people would have consumed in an entire year, just a few hundred years ago, you get a sense of how dramatically our environment has changed. The sweet craving that once offered a survival advantage now works against us.
今 天,添加的糖分随处可见,在美国买到的包装食品中,有大约75%含有添加糖分。普通的美国人平均每天消耗的糖分在四分之一磅到半磅(约合110克至220 克)之间。如果我们思考一下,今天一听碳酸饮料里含有的添加糖分,可能高于几百年前多数人一整年消耗的糖分,就能明白我们周围的环境发生了多么巨大的改 变。渴求糖分曾经是我们的生存优势,但现在却对我们不利。
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