Caffeine in late afternoon, early evening can disrupt sleep
American Academy of Sleep Medicine
Wednesday, November 20, 2013
A study in the November issue of the Journal of Clinical Sleep Medicine shows that caffeine consumption six hours before bedtime can have significant, disruptive effects on sleep. Results show that objectively measured total sleep time was reduced by more than one hour. According to the authors, the findings provide empirical support for sleep hygiene recommendations to refrain from substantial caffeine use for a minimum of six hours prior to bedtime.