集中性营销策略案例:你和家人正在受鱼的毒害吗？

你和你的家人正在受鱼类的毒害吗？这个基本的问题是最近的旧金山一个人在质疑自己。David Ewing Duncan，他是最近新出版的《实验人》的作者，他将科学思想投入试验探索到底吃一口鱼他能同时吃下多少的水银和其他的有毒物质。他的实验结果令人担忧。

The Environmental Protection Agency (EPA) insists that "most people's fish consumption does not cause a health concern." Still, the agency concedes that high levels of mercury in the bloodstream of unborn babies and young children may harm the developing nervous system. The agency advises women who are pregnant, nursing, or of childbearing age, and young children to limit their consumption of certain types of fish and avoid eating shark, swordfish, king mackerel, or tilefish altogether because they contain high levels of mercury.

环保署（EPA）坚决表明“大部分人消费的鱼类不会对健康带来危害。”随后，则让步说道对于未出生的和新生的孩子，血液中高含量的水银可能对其神经系统的发展造成影响。环保署则建议孕期的，哺育期的以及育龄期的女性和儿童应限于吃一些特定的鱼类，不要食用鲨鱼，剑鱼，大西洋马鲛或者方头鱼等等，因为他们的肉质有高含量的水银。

The EPA's blood threshold for methylmercury, the most common form of mercury that accumulates in the body, is 5.8 µg/l (micrograms per liter.) To test his own levels of methylmercury, Duncan submitted blood and urine tests for lab analysis both before and after eating fish. In the "before" tests, Duncan registered a level of less than 4 µg/l, well within safe limits. A few days later, after eating halibut for lunch and swordfish for dinner, Duncan again submitted blood and urine tests for methylmercury analysis. This time, the lab work showed that his methylmercury level had spiked to 13 µg/l, well ABOVE the EPA's safe threshold. And considering that children have suffered losses in IQ at levels just slightly above 5.8 µg/l, the results are nothing if not unsettling. 

环保署对于血液中甲基水银的阈值是5.8 µg/l (毫克每升)，甲基水银是我们体内水银积累的常见形式。为了测得自己体内的甲基水银的含量，Duncan在吃鱼前后分别提交了血液和尿液的样本用于实验。在食用前测试中，Duncan的实验记录是小于4 µg/l，完全在安全范围中。几天以后，在他吃午餐吃大比目鱼和晚餐吃了剑鱼后，他又提交了血液和尿液的样本测试甲基水银。这次，实验结果表明他体内的甲基水银含量高达13 µg/l，完全超出环保署的安全阈值。这样的结果除了令人不安也没什么，可是要考虑到稍微超出阈值5.8 µg/l一点，那就会对孩子智商造成严重的影响

Time and time again, consumers are told that fish is a safe, healthy source of lean protein and fatty acids, but do the health benefits outweigh the toxin risk? One thing is certain, if you do choose to eat fish, choose those varieties that contain the least amount of mercury and limit your consumption to just a few servings a week.

消费者被一次次的告知，鱼类是安全的，富含健康的瘦蛋白和脂肪酸，但是这些健康物质能够有中毒危险吗？有一件事是肯定的，就是如果你要吃鱼，那就选择几类水银含量低的并且要控制每周吃鱼的分量。