能量饮料之惑.docVIP

能量饮料之惑 　　Leading： 　　市场上称那种既可用于运动后补充体力，也可以供给普通百姓饮用的饮料为能量饮料。能量饮料风靡全球，据说它们能让人精力充沛、思维敏捷。事实果真如此吗？ 　　Energy drinks are now available in nearly every store and they promise to make people feel more energetic and think more clearly. These products have names like Red Bull，Monster，5-Hour Energy and so on，which appeal mainly to young people and are fueled mainly by caffeine①. 　　Chad is a medical researcher who got interested in studying energy drinks because of the explosion in their popularity in the last few years. He says he and his research team have found three major things about energy drinks. One：there are hundreds of brands of energy drinks in most major countries. Two：the drinks are not clearly labeled with enough information such as what are contained in the drink，the date and even names of their makers. And three：the amount of caffeine varies greatly. Some contain as little as fifty milligrams②，others as much as five hundred. 　　By comparison，a cup of Starbucks brewed coffee contains three hundred thirty milligrams in four hundred seventy-three milliliters. 　　Some energy drinks contain a mixture of ingredients③ listed as an“energy blend”. Ingredients like taurine，guarana and inositol are natural substances. But scientists do not know a lot about them and how they interact with each other. These ingredients may be dangerous for people who drink them. What is worse，he says，there is no listing of the amount of each ingredient. 　　Some people combine energy drinks with alcohol. They think they can drink more alcohol that way and not be affected. Studies，however，suggest that they are still under the influence of the alcohol even if they do not feel that way. 　　Some makers of energy drinks do provide warnings. For example，a popular energy drink warns against use by people who are nursing a baby or under the age of twelve. Energy shots are small bottles of liquid. The directions also advise people to limit caffeine products and to drink only half the bottle if t