限时饮食可以预防甚至逆转肥胖
<p><span word="Scientists">Scientists</span>, <span word="like">like</span> <span word="mothers">mothers</span>, <span word="have">have</span> <span word="long">long</span> <span word="suspected">suspected</span> <span word="that">that</span> <span word="midnight">midnight</span> <span word="snacking">snacking</span> <span word="is">is</span> <span word="inadvisable">inadvisable</span>. <span word="But">But</span> <span word="until">until</span> <span word="a">a</span> <span word="few">few</span> <span word="years">years</span> <span word="ago">ago</span>, <span word="there">there</span> <span word="was">was</span> <span word="little">little</span> <span word="in">in</span> <span word="the">the</span> <span word="way">way</span> <span word="of">of</span> <span word="science">science</span> <span word="behind">behind</span> <span word="those">those</span> <span word="suspicions">suspicions</span>. <span word="Now">Now</span>, <span word="a">a</span> <span word="new">new</span> <span word="study">study</span> <span word="shows">shows</span> <span word="that">that</span> <span word="mice">mice</span> <span word="prevented">prevented</span> <span word="from">from</span> <span word="eating">eating</span> <span word="at">at</span> <span word="all">all</span> <span word="hours">hours</span> <span word="avoided">avoided</span> <span word="obesity">obesity</span> <span word="and">and</span> <span word="metabolic">metabolic</span> <span word="problems">problems</span> — <span word="even">even</span> <span word="if">if</span> <span word="their">their</span> <span word="diet">diet</span> <span word="was">was</span> <span word="sometimes">sometimes</span> <span word="unhealthful">unhealthful</span>.</p><p>长期以来，母亲们都认为不宜在半夜吃零食，科学家们对此也持有相同的看法。但直到几年前，人们也只是有此怀疑，却没有多少科学证据可以支持它。现在，一项在小鼠中进行的新研究显示，即使有时候它们的饮食不够健康，但只要不是一天到晚吃个不停，就可避免肥胖和代谢问题。</p><p><span word="Researchers">Researchers</span> <span word="at">at</span> <span word="the">the</span> <span word="Salk">Salk</span> <span word="Institute">Institute</span> <span word="for">for</span> <span word="Biological">Biological</span> <span word="Studies">Studies</span> <span word="in">in</span> <span word="San">San</span> <span word="Diego">Diego</span> <span word="and">and</span> <span word="elsewhere">elsewhere</span> <span word="began">began</span> <span word="experimenting">experimenting</span> <span word="with">with</span> <span word="the">the</span> <span word="eating">eating</span> <span word="patterns">patterns</span> <span word="of">of</span> <span word="laboratory">laboratory</span> <span word="mice">mice</span> <span word="in">in</span> <span word="a">a</span> <span word="previous">previous</span> <span word="study">study</span>. <span word="On">On</span> <span word="that">that</span> <span word="occasion">occasion</span>, <span word="some">some</span> <span word="mice">mice</span> <span word="consumed">consumed</span> <span word="high">high</span>-<span word="fat">fat</span> <span word="food">food</span> <span word="whenever">whenever</span> <span word="they">they</span> <span word="wanted">wanted</span>; <span word="others">others</span> <span word="had">had</span> <span word="the">the</span> <span word="same">same</span> <span word="diet">diet</span> <span word="but">but</span> <span word="could">could</span> <span word="eat">eat</span> <span word="only">only</span> <span word="during">during</span> <span word="an">an</span> <span word="eight">eight</span>-<span word="hour">hour</span> <span word="window">window</span>. <span word="None">None</span> <span word="exercised">exercised</span>. <span word="The">The</span> <span word="mice">mice</span> <span word="that">that</span> <span word="ate">ate</span> <span word="at">at</span> <span word="all">all</span> <span word="hours">hours</span> <span word="soon">soon</span> <span word="grew">grew</span> <span word="chubby">chubby</span> <span word="and">and</span> <span word="unwell">unwell</span>, <span word="with">with</span> <span word="symptoms">symptoms</span> <span word="of">of</span> <span word="diabetes">diabetes</span>. <span word="But">But</span> <span word="the">the</span> <span word="mice">mice</span> <span word="on">on</span> <span word="the">the</span> <span word="eight">eight</span>-<span word="hour">hour</span> <span word="schedule">schedule</span> <span word="gained">gained</span> <span word="little">little</span> <span word="weight">weight</span> <span word="and">and</span> <span word="developed">developed</span> <span word="no">no</span> <span word="metabolic">metabolic</span> <span word="problems">problems</span>. <span word="Those">Those</span> <span word="results">results</span> <span word="were">were</span> <span word="published">published</span> <span word="in">in</span> 2017.</p><p>在此前的一项研究中，美国圣地亚哥索尔克生物研究所(<span word="Salk">Salk</span> <span word="Institute">Institute</span> <span word="for">for</span> <span word="Biological">Biological</span> <span word="Studies">Studies</span>)和其他机构的研究人员们开始对实验室小鼠的饮食模式进行实验。在该研究中，有一部分小鼠可以依自己的喜好，随时食用高脂肪食物，而其他小鼠虽然也可以享用完全相同的饮食，但它们每天可以进食的时间限制在八小时。两组小鼠都未进行任何运动。全天均可进食的小鼠很快就胖得圆滚滚的，健康也发生了问题，出现了糖尿病的症状。但是严格遵照八小时时间表进食的小鼠体重几乎没有增加，而且也未出现代谢问题。上述研究结果在2017年发表。</p>
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