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a drink intended to boost mental energy, typically containing sugar and caffeine or other stimulants.
a soft drink containing ingredients designed to boost the drinker’s energy, esp after exercise

a soft drink offering metabolic stimulation through B-complex vitamins and central nervous system stimulation through caffeine, esp. for athletes, etc.; see also { sports drink }

Most energy drinks on the other hand, offer a burst of intense energy followed by a crash.
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