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'Less is more,' when it comes to sugary, high-caffeine energy drinks, researchers say
Date:12/2/2010

WASHINGTON Moderate consumption of so-called energy drinks can improve people's response time on a lab test measuring behavioral control, but those benefits disappear as people drink more of the beverage, according to a study published by the American Psychological Association.

With the growing popularity of energy drinks such as Red Bull, Monster, Burn and RockStar, especially among high school and college students, psychologists have been studying the effects of sugary, highly caffeinated drinks on young people. College students in particular have been using these drinks to stay awake, help them study and cut the intoxicating effects of alcohol. The latter use has sent several young people to hospital emergency rooms, leading a handful of state liquor control boards recently to ban the drink Four Loko, which combined caffeine and alcohol.

"Several aspects of cognitive performance that show improvement under the influence of caffeine are attention, reaction time, visual search, psychomotor speed, memory, vigilance and verbal reasoning," said Cecile A. Marczinski, PhD, of Northern Kentucky University and co-author of the study "Acute Effects of a Glucose Energy Drink on Behavioral Control." "The results of the current study illustrate that energy drinks can increase stimulation and decrease mental fatigue, suggesting that they may be used with alcohol to counteract the sedation associated with drinking."

The study, published in the December issue of the APA journal Experimental and Clinical Psychopharmacology, included 80 college students (34 men and 46 women) between the ages of 18 and 40. Some were given Red Bull 7, while others were given lower amounts of caffeine added to Squirt, a lemon-flavored decaffeinated soda that looks and tastes like Red Bull. Others were given plain Squirt as a placebo. A half-hour after finishing the drinks, participants took a computerized "go/no-go" test in which they had to respond quick
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Contact: Kim I. Mills
kmills@apa.org
202-336-6048
American Psychological Association
Source:Eurekalert

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