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September 20, 2008: 04:35 PM EST
The popularity of energy drinks is leading to more cases of caffeine dependence and negative health impacts, says lead researcher Chad Reissig in a paper published in the journal Drug and Alcohol Dependence. Reissig says that concerns over energy drinks stem from the potential adverse consequences of higher caffeine intake on consumers, particularly younger people. Energy drinks contain considerably more caffeine than conventional sources such as tea and coffee, and often their caffeine content is not specified on product labels. The study highlights a clinical syndrome known as caffeine intoxication as a particular concern, linking it to symptoms such as nervousness, anxiety, restless-ness, insomnia, gastrointestinal upset, tremors, tachycardia and psychomotor agitation. Some studies have also suggested that the symptoms of caffeine intoxication closely resemble those of other anxiety and mood disorders, according to the review. Caffeine withdrawal is another area of concern. The British Soft Drink Association (BSDA) says that energy drinks are safe for human consumption and are strongly regulated across Europe.
C.J. Reissig et al, "Caffeinated energy drinks - A growing problem.", Drug and Alcohol Dependence, September 20, 2008, via National Center for Biotechnology Information
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