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Caffeine Boost May Not Help You If You Are Extremely Sleep-Deprived, Study Says

(Nature World News) Caffeine won't give you a mental boost if you did not get enough sleep for three nights in a row, a new study suggested.
"These results are important because caffeine is a stimulant widely used to counteract performance decline following periods of restricted sleep," Tracy Jill Doty, research scientist at Walter Reed Army Institute of Research and lead author of the study, said in a news release.
"The data from this study suggests that the same effective daily dose of caffeine is not sufficient to prevent performance decline over multiple days of restricted sleep," Doty added.
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