谁在“误入益智歧途”：吃鱼

Eating Fish 吃鱼

　　Eating Fish 吃鱼

　　Herman Melville. Ernest Hemingway. Some of our brightest minds had a thing for10) seafood. That may be no coincidence. Oily fish are rich in docosahexaenoic acid11) (DHA), an omega-3 fatty acid that accounts for 40 percent of the makeup of brain cell membranes12) and which could improve neurotransmission. A handful of studies have linked fish-heavy diets with reduced risk of mental decline in old age.

　　A test of mice found that an omega-3-rich diet had no impact on cognitive function. And cold-water fish that are high in omega-3s are also likely to have elevated levels of methylmercury13) and PCBs14), both known neurotoxins. It would be great if fish really were brain food. Unfortunately, we're got to throw this one back.

　　赫尔曼·梅尔维尔、欧内斯特·海明威，这些有着最聪明头脑的人都特别喜欢吃海产品。这也许并非巧合。深海油鱼富含二十二碳六烯酸(DHA)，这是一种omega-3

　　一项针对老鼠的实验却表明，富含omega-3的食物对认知能力的提升并没有什么帮助。同时，富含omega-3的冷水鱼有可能会使甲基汞和聚氯联苯的含量提高，这两种物质都是神经毒素。若是吃鱼真有助于提升智力，那么再好不过了。然而遗憾的是，我们必须把这种说法抛开。