每天吃雞蛋或增加心臟風險?

How do you like your eggs? Poached? Over easy on toast? How about scrambled with a side of bacon? Eggs make for a delicious meal, and for the past few years, we've been able to enjoy them guilt-free-even the American Heart Association (AHA) has approved one egg a day for most people. Now, headLines are blaring that eggs are evil again. Before you banish your breakfast favorite (or switch back to egg-white omelets), you should know that this research is far from the last word on eggs.

你喜歡吃哪種做法的雞蛋？水煮蛋？還是喜歡將雞蛋塗在吐司上？在培根上塗好雞蛋液，煎一煎如何？過去幾年來，我們一直都在盡情享用美味的雞蛋--美國心臟協會（AHA）甚至也已認同：大多數人每天可以吃一顆雞蛋。現而今，新聞頭條又在呼籲"雞蛋是有害的"！在放棄最愛的早餐之前（或重新回到蛋白卷的日子前），你應該知道--有關雞蛋的研究與新聞頭條所鼓吹的內容相去甚遠。

Northwestern University researchers Victor W. Zhong, PhD, Linda Van Horn, PhD, and Marilyn C. Cornelis co-authored the new study. To arrive at their findings, they collected data from six previous studies that tracked the health of 29,615 adults for about 18 years on average. After compiling results from the various studies, the researchers concluded that 300 milligrams of cholesterol per day slightly raised a person's risk of heart disease and stroke. One egg contains about 186 milligrams of cholesterol-regularly eat two or more, and your heart risk would start to climb.

美國西北大學的研究員Victor W. Zhong博士，琳達·萬·霍恩博士（Linda Van Horn）和Marilyn C. Cornelis是這項新研究的共同作者。爲了得出研究結論，他們從以往的6篇研究中收集了數據，這些研究在平均18年的時間內追蹤了29615位成年人的健康狀況。彙總各項研究的結果之後，研究員得出結論：每天攝入300毫克的膽固醇會略微增加一個人患心臟病和中風的風險。一顆雞蛋含有約186毫克膽固醇--經常吃2顆或2顆以上的雞蛋，你患心臟病的風險就會增加。

Given that current dietary guidelines already recommend limiting yourself to one egg a day, it's hard to see what all the fuss is about. But if you're concerned, you should know that this kind of research has limitations: The study can only determine a possible link between eggs, cholesterol, and heart trouble, not that eating eggs actually caused heart trouble. Another issue with the findings is that there was only one diet report taken for each of the 29,000-plus adults-almost two decades ago.

由於當前飲食指南已建議將雞蛋攝入量控制在每天一顆，所以媒體這般大驚小怪又是爲何？但如果你真有顧慮，那也應該知道這類研究有其侷限性。研究只能給出雞蛋、膽固醇和心臟問題之間的可能聯繫，而非確切告訴我們：吃雞蛋會導致心臟問題。該研究還存在另一個問題：在這29000多名成年受試者中，研究員只獲得了一份飲食報告--而且還是20年前的。

Frank Hu, a professor of nutrition and epidemiology at the Harvard T.H. Chan School of Public Health, told NPR: "So much data have already been published on this topic, which generally show that low to moderate egg consumption (no more than one egg per day) is not associated with increased risk of heart attack or stroke." Plus, there are also many other risk factors that contribute to heart disease.

哈佛大學陳曾熙公共衛生學院（Harvard T.H. Chan School of Public Health）的營養與流行病學教授Frank Hu對美國國家公共電臺說道："有關該話題的數據已發表太多了，這些數據通常表明：低至中等量的雞蛋攝入（每天不超過一顆）與心臟病或中風風險增加無關。"此外，還有很多其它風險因素也會導致心臟病。