Besides the sugars and acids, other soft drink ingredients are of concern. Caffeine, which is added to many of the most popular soft drinks, is a mildly addictive, stimulant drug.

除了糖和脂肪酸，其他软性饮料的成分，尤其令人关注。咖啡因，被加在许多最受欢迎的饮料，是一种温和上瘾的兴奋剂药物。

"In the United States, stimulant medications are widely abused," Dr. Nora Volkow, director of the National Institute of Drug abuse, said in a telephone briefing.

Nora Volkow国家药物滥用中心主任，在一份电话简报中说“在美国，刺激性药物已被广泛的滥用了。”

Cocaine is a strong stimulant drug which suppresses appetite and the net result of that is people not eating properly.

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An anecdote about mephedrone, a synthetic derivative of a compound found in kat, a stimulant drug popular in parts of east Africa, illustrates the problem.

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On Feb. 10, a panel of drug safety experts unexpectedly recommended that the U.S. Food and Drug Administration put a visible, boxed warning on stimulant medicines like Adderall, Ritalin and Concerta, which are used to treat the disorder in both children and adults.

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