超过一半的美国成年人每天都在饮用咖啡。喝咖啡对健康的好处很多：冲泡咖啡中富含抗氧化剂，喝一杯后可以唤醒大脑，使人们更加思维敏捷和专注。
“世界癌症研究基金会”(World Cancer Research Fund)发表的报告称，咖啡饮料可以很明显地降低人们罹患肝癌的风险。
研究人员称，常饮用咖啡者可以显著性降低罹患肝癌风险的14%。在一项正在进行中并持续更新的项目中，英国伦敦帝国学院(Imperial College London)研究人员分析涵盖全球820万人、共24500件肝癌病例的34项研究，这些研究探讨了饮食、营养、运动和体重与癌症风险和生存率的关系。虽然目前还不知道咖啡如何预防相关疾病，但研究者推测咖啡中的某些化合物可能有助于抵抗毒素。咖啡和咖啡提取物也能减少炎症相关基因的表达，而肝脏受这些保护作用最明显。
酒精对身体危害很大，除了造成内分泌系统负担，还可能对胃部、肝脏、肾脏，甚至心脏产生伤害，部分研究还显示，喝酒会致癌。但研究人员发现，饮用咖啡也可以对饮酒行为产生保护作用，饮用咖啡可以减少每天饮用3次酒精饮料人群的肝损伤，并最终减少其罹患肝癌的风险。
那么，每天要喝多少咖啡才能降低酒精的副作用?“世界癌症研究基金会”研究指出，每天喝酒45克(相当于3杯)的人每天喝咖啡一杯就有帮助。
For Your Liver's Sake, You Should Probably Keep Drinking Coffee
More than half of American grown-ups drink coffee every day. Their non-sipping counterparts may want to follow suit.
The health benefits associated with drinking coffee are plenty: The brew is packed with antioxidants and downing a cup can help wake up the brain and make a person feel more alert and focused. A new report published by the World Cancer Research Fund found that the apparently magical liquid can also decrease a person's risk for liver cancer.
The numbers are pretty significant: Researchers found that a consistent love for coffee could lower liver cancer risk by 14 percent. As part of ongoing research for the Continuous Update Project, a research team at Imperial College London analyzed 34 existing global studies about how diet, nutrition, physical activity and weigh relate to cancer risk and survival. Collectively, the studies covered approximately 8.2 million adults and 24,500 cases of liver cancer. Researchers are not sure why coffee might protect against the disease, but they hypothesized that certain compounds in the beverage could help to fight toxins. "Both coffee and coffee extracts have also been shown to reduce the expression of genes involved in inflammation, and the effects appear to be most pronounced in the liver," the report reads.
Researchers also found that those with an alcohol habit benefited from the addition a coffee habit: Those who consumed about three alcoholic beverages a day could reduce liver damage, ultimately lessening their risk for liver cancer.
来源：医学论坛网 作者：晓兰 编译
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