改善健康也许很简单:每天少吃300卡
<p><span word="Cutting">Cutting</span> 300 <span word="Calories">Calories</span> <span word="a">a</span> <span word="Day">Day</span> <span word="Shows">Shows</span> <span word="Health">Health</span> <span word="Benefits">Benefits</span></p><p>改善健康也许很简单：每天少吃300卡</p><p><span word="Scientists">Scientists</span> <span word="have">have</span> <span word="long">long</span> <span word="known">known</span> <span word="a">a</span> <span word="fairly">fairly</span> <span word="reliable">reliable</span> <span word="way">way</span> <span word="to">to</span> <span word="extend">extend</span> <span word="life">life</span> <span word="span">span</span> <span word="in">in</span> <span word="rodents">rodents</span> <span word="and">and</span> <span word="other">other</span> <span word="lab">lab</span> <span word="animals">animals</span>: <span word="Reduce">Reduce</span> <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="calories">calories</span> <span word="they">they</span> <span word="eat">eat</span> <span word="by">by</span> 10 <span word="percent">percent</span> <span word="to">to</span> 40 <span word="percent">percent</span>.</p><p>科学家们早就知道一种相当可靠的方式，能够延长啮齿类及其他实验室动物的寿命：把他们摄入的卡路里数量减少10%至40%。</p><p><span word="This">This</span> <span word="strategy">strategy</span>, <span word="known">known</span> <span word="as">as</span> <span word="caloric">caloric</span> <span word="restriction">restriction</span>, <span word="has">has</span> <span word="been">been</span> <span word="shown">shown</span> <span word="to">to</span> <span word="increase">increase</span> <span word="the">the</span> <span word="life">life</span> <span word="span">span</span> <span word="of">of</span> <span word="various">various</span> <span word="organisms">organisms</span> <span word="and">and</span> <span word="reduce">reduce</span> <span word="their">their</span> <span word="rate">rate</span> <span word="of">of</span> <span word="cancer">cancer</span> <span word="and">and</span> <span word="other">other</span> <span word="age">age</span>-<span word="related">related</span> <span word="ailments">ailments</span>. <span word="Whether">Whether</span> <span word="it">it</span> <span word="can">can</span> <span word="do">do</span> <span word="the">the</span> <span word="same">same</span> <span word="in">in</span> <span word="people">people</span> <span word="has">has</span> <span word="been">been</span> <span word="an">an</span> <span word="open">open</span> <span word="question">question</span>. <span word="But">But</span> <span word="an">an</span> <span word="intriguing">intriguing</span> <span word="new">new</span> <span word="study">study</span> <span word="suggests">suggests</span> <span word="that">that</span> <span word="in">in</span> <span word="young">young</span> <span word="and">and</span> <span word="middle">middle</span>-<span word="aged">aged</span> <span word="adults">adults</span>, <span word="chronically">chronically</span> <span word="restricting">restricting</span> <span word="calorie">calorie</span> <span word="intake">intake</span> <span word="can">can</span> <span word="have">have</span> <span word="an">an</span> <span word="impact">impact</span> <span word="on">on</span> <span word="their">their</span> <span word="health">health</span>.</p><p>这种被称为卡路里限制的策略已被证实可延长各种生物的寿命，并降低它们患癌症及其他年龄相关疾病的几率。它是否能对人类起到同样的作用尚无定论。但一项饶有趣味的新研究表明，长期限制青壮年人的卡路里摄入可对他们的健康产生影响。</p><p><span word="In">In</span> <span word="the">the</span> <span word="new">new</span> <span word="study">study</span>, <span word="which">which</span> <span word="was">was</span> <span word="funded">funded</span> <span word="by">by</span> <span word="the">the</span> <span word="National">National</span> <span word="Institutes">Institutes</span> <span word="of">of</span> <span word="Health">Health</span> <span word="and">and</span> <span word="published">published</span> <span word="this">this</span> <span word="month">month</span> <span word="in">in</span> <span word="the">the</span> <span word="Lancet">Lancet</span> <span word="Diabetes">Diabetes</span> & <span word="Endocrinology">Endocrinology</span>, <span word="researchers">researchers</span> <span word="looked">looked</span> <span word="at">at</span> <span word="a">a</span> <span word="group">group</span> <span word="of">of</span> 143 <span word="healthy">healthy</span> <span word="men">men</span> <span word="and">and</span> <span word="women">women</span> <span word="who">who</span> <span word="ranged">ranged</span> <span word="in">in</span> <span word="age">age</span> <span word="from">from</span> 21 <span word="to">to</span> 50. <span word="They">They</span> <span word="were">were</span> <span word="instructed">instructed</span> <span word="to">to</span> <span word="practice">practice</span> <span word="caloric">caloric</span> <span word="restriction">restriction</span> <span word="for">for</span> <span word="two">two</span> <span word="years">years</span>. <span word="They">They</span> <span word="could">could</span> <span word="eat">eat</span> <span word="the">the</span> <span word="foods">foods</span> <span word="they">they</span> <span word="wanted">wanted</span> <span word="so">so</span> <span word="long">long</span> <span word="as">as</span> <span word="they">they</span> <span word="cut">cut</span> <span word="back">back</span> <span word="on">on</span> <span word="the">the</span> <span word="total">total</span> <span word="amount">amount</span> <span word="of">of</span> <span word="food">food</span> <span word="they">they</span> <span word="ate">ate</span>, <span word="with">with</span> <span word="the">the</span> <span word="aim">aim</span> <span word="of">of</span> <span word="cutting">cutting</span> <span word="the">the</span> <span word="calories">calories</span> <span word="they">they</span> <span word="consumed">consumed</span> <span word="by">by</span> 25 <span word="percent">percent</span>.</p>
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