WASHINGTON – U.S. service members in Afghanistan battle zones who consumed three or more caffeine-charged energy drinks a day were prone to sleepiness and dozing off while on guard duty, according to a report.
Forty-five percent of the service members in Afghanistan combat areas in 2010 consumed energy drinks daily, some of which contain the caffeine equivalent of one to three cups of coffee, the study said. The finding was published Thursday in the Centers for Disease Control and Preventions Morbidity and Mortality Weekly report.
About 6 percent of adolescent and young males in the U.S. civilian and military populations drink energy drinks each day, the report said. The products, such as those made by Monster Beverage Corp. and Red Bull, can have negative side effects and have been the focus of investigation by the Food and Drug Administration.
Service members should be educated regarding the potential adverse effects of excessive energy drink consumption on sleep and mission performance and should be encouraged to moderate their energy drink consumption in combat environments, Robin Toblin, an epidemic intelligence service officer at the CDC and lead author, said in the study.
Fourteen percent of service members surveyed consumed at least three energy drinks a day, the report said. They reported sleeping less, having more sleep disruptions from stress and illness, and falling asleep on guard duty and in briefings more frequently than those who had two or fewer drinks a day.
They were also more likely to report sleeping less than four hours a night on average than those consuming fewer energy drinks.
Previous research has found that 200 milligrams of caffeine, the equivalent of one to two energy drinks, improved cognitive performance in the military population.