Coffee And Nighttime Jobs Don't Mix, Study Finds

ScienceDaily (2009-11-04) -- Night-shift workers should avoid drinking coffee if they wish to improve their sleep, according to recent research. A new study has found the main byproduct of coffee, caffeine, interferes with sleep and this side-effect worsens as people age.

http://www.sciencedaily.com/releases/2009/11/091103112239.htm

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