研究发现：每日饮咖啡超过4杯或增大死亡风险

火之舞

常喝咖啡的人请注意。美国一项最新研究发现，每周喝咖啡超过28杯或每天超过4杯，将会使55岁以下无论男女的死亡风险显著增加。

美国南卡罗来纳大学在新一期《梅奥诊所学报》上报告说，他们对在1971年至2002年间参与生活方式调查的4万多名受访者进行分析，结果发现，55岁以下男性每周喝28杯咖啡将导致他们死亡风险增加56％，而55岁以下女性死亡风险则增加一倍。不过，研究并未发现喝咖啡过多对55岁以上人群有不利影响。

这项研究所定义的一杯咖啡是6到8盎司（约180至240毫升）。研究共同作者、南卡罗来纳大学助理教授隋雪梅提醒：“喝咖啡多的人应该小心，因为这项大型研究表明这至少与总体死亡风险增加有关，尤其小于55岁的人应该警惕。”

隋雪梅对新华社记者解释说，医学界有关咖啡因对人体的影响一直存在激烈争论，一些报告认为咖啡因有毒副作用，另一些则显示其有益健康。他们的研究尽管并未确定咖啡与死亡风险之间的因果关系，但为这场争论提供了新的见解。

那么，一个人每天喝多少咖啡适宜呢？隋雪梅说：“从来没有机构给出过具体建议。从心血管疾病与死亡率方面看，少量与适量饮用应该没什么问题。我们的研究表明每周最多28杯是安全的。我个人的观点是少量饮用，可以每天1到3杯。”

隋雪梅对记者说：“自我节制是真正的关键。请不要过量喝咖啡。”

寒羽西

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