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Saturday, February 6, 2010

Coffee Reduces Deep Sleep

Coffee disturbs sleep. It is not widely known, but drinking coffee at any time of the day will disturb deep sleep. It will make your sleep lighter and less effective. Researchers concluded that caffeine in coffee or soda "prolongs the time to fall asleep, decreases the duration of slow-wave sleep, and attenuates the EEG correlates of sleep homeostasis." Health is clearly impaired by caffeine due to its effect in reducing sleep quality. This is not to say that caffeine does not have other attributes that may, in some other ways, contribute to health. But a balanced view of the drug needs to take into consideration this sleep disturbing effect that is clearly documented in the scientific literature. References
  1. 2005. "A functional genetic variation of adenosine deaminase affects the duration and intensity of deep sleep in humans." Proc Natl Acad Sci U S A. Oct 25;102(43):15676-81. Epub 2005 Oct 12. R├ętey JV, Adam M, Honegger E, Khatami R, Luhmann UF, Jung HH, Berger W, Landolt HP. Full text available at
  2. 1998. Caffeine Blues: Wake Up to the Hidden Dangers of America's #1 Drug. Stephen Snehan Cherniske. Grand Central Publishing.

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