每天几杯咖啡是否有助于缓解抑郁
<p><span word="Following">Following</span> <span word="the">the</span> <span word="research">research</span> <span word="on">on</span> <span word="the">the</span> <span word="health">health</span> <span word="effects">effects</span> <span word="of">of</span> <span word="caffeine">caffeine</span> <span word="is">is</span> <span word="dizzying">dizzying</span>. <span word="Positive">Positive</span> <span word="in">in</span> <span word="some">some</span> <span word="cases">cases</span>, <span word="negative">negative</span> <span word="in">in</span> <span word="others">others</span> – <span word="it">it</span>’<span word="s">s</span> <span word="hard">hard</span> <span word="to">to</span> <span word="know">know</span> <span word="whether">whether</span> <span word="that">that</span> <span word="morning">morning</span> <span word="cup">cup</span> <span word="of">of</span> <span word="joe">joe</span> <span word="is">is</span> <span word="a">a</span> <span word="health">health</span> <span word="elixir">elixir</span> <span word="or">or</span> <span word="slow">slow</span>-<span word="acting">acting</span> <span word="poison">poison</span>.</p><p>咖啡对健康有什么影响，相关研究给出了五花八门的结论，让人不知所措。有些说有益健康，另一些说有害健康——很难知道早上的那一杯咖啡到底是健康的灵药还是慢性毒药。</p><p><span word="In">In</span> <span word="the">the</span> <span word="latest">latest</span> <span word="major">major</span> <span word="study">study</span> <span word="on">on</span> <span word="caffeine">caffeine</span>’<span word="s">s</span> <span word="effects">effects</span>, <span word="researchers">researchers</span> <span word="from">from</span> <span word="the">the</span> <span word="Harvard">Harvard</span> <span word="School">School</span> <span word="of">of</span> <span word="Public">Public</span> <span word="Health">Health</span> <span word="found">found</span> <span word="a">a</span> <span word="correlation">correlation</span> <span word="between">between</span> <span word="drinking">drinking</span> 2-4 <span word="cups">cups</span> <span word="of">of</span> <span word="caffeinated">caffeinated</span> <span word="coffee">coffee</span> <span word="each">each</span> <span word="day">day</span> <span word="and">and</span> <span word="lower">lower</span> <span word="suicide">suicide</span> <span word="risk">risk</span> <span word="among">among</span> <span word="adults">adults</span>.</p><p>在最近有关咖啡因的一项重要研究中，哈佛大学公共卫生学院的研究人员们发现，每天饮用2-4杯含咖啡因的咖啡与成年人中自杀风险的下降存在着相关性。</p><p><span word="The">The</span> <span word="study">study</span>, <span word="published">published</span> <span word="in">in</span> <span word="The">The</span> <span word="World">World</span> <span word="Journal">Journal</span> <span word="of">of</span> <span word="Biological">Biological</span> <span word="Psychiatry">Psychiatry</span>, <span word="was">was</span> <span word="a">a</span> <span word="meta">meta</span>-<span word="review">review</span> <span word="of">of</span> <span word="three">three</span> <span word="extensive">extensive</span> <span word="U">U</span>.<span word="S">S</span>. <span word="health">health</span> <span word="studies">studies</span> <span word="that">that</span> <span word="included">included</span> <span word="a">a</span> <span word="total">total</span> <span word="of">of</span> 43, 599 <span word="men">men</span> <span word="and">and</span> 164, 825 <span word="women">women</span>. <span word="Consumption">Consumption</span> <span word="of">of</span> <span word="caffeine">caffeine</span> (<span word="from">from</span> <span word="tea">tea</span>, <span word="soda">soda</span> <span word="and">and</span> <span word="chocolate">chocolate</span>), <span word="coffee">coffee</span> <span word="and">and</span> <span word="decaffeinated">decaffeinated</span> <span word="coffee">coffee</span> <span word="was">was</span> <span word="evaluated">evaluated</span> <span word="among">among</span> <span word="study">study</span> <span word="participants">participants</span> <span word="every">every</span> <span word="four">four</span> <span word="years">years</span> <span word="via">via</span> <span word="questionnaire">questionnaire</span>. <span word="Across">Across</span> <span word="all">all</span> <span word="three">three</span> <span word="studies">studies</span>, <span word="coffee">coffee</span> <span word="accounted">accounted</span> <span word="for">for</span> <span word="the">the</span> <span word="majority">majority</span> <span word="of">of</span> <span word="caffeine">caffeine</span> <span word="consumed">consumed</span> <span word="at">at</span> 71% <span word="of">of</span> <span word="the">the</span> <span word="total">total</span>.</p><p>该研究发表在《世界生物精神医学杂志》（<span word="The">The</span> <span word="World">World</span> <span word="Journal">Journal</span> <span word="of">of</span> <span word="Biological">Biological</span> <span word="Psychiatry">Psychiatry</span>）上，这是一项对美国三个规模浩大的健康研究项目（共有43,599名男性和164,825名女性参加）进行的元分析。每四年，通过问卷形式对调查对象的咖啡因（来自茶、苏打和可口可乐等饮料）、咖啡和脱咖啡因咖啡的摄入情况进行评估。全部三项研究中，从咖啡中摄入的咖啡因占绝大多数，比例高达71%。</p>
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