Caffeine Disrupts Sleep for Morning People, but Not Night Owls

[Naomi Most]

Another interesting piece of the caffeine puzzle…http://www.scientificamerican.com/article.cfm?id=caffeine-disrupts-sleep-f...and another study conducted entirely on college students, so... y'know.But at least they were up-front about that variable:

As college students, they tended to be so sleep-deprived that, for most, "it didn't matter how much caffeine they had" they slept well whenever they finally hit the sack, said study researcher Jamie Zeitzer, an assistant professor of psychiatry and behavioral sciences at Stanford University.However, for the early risers, the more caffeine in their bodies, the more time they spent awake during the night after initially falling asleep. This was not seen in the night owls.

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