Even if you're dragging at 5pm, you may want to avoid that late-afternoon latte. Consuming caffeine even six hours before bedtime can lead to significant sleep disturbances, according to a new study in the Journal of Clinical Sleep Medicine.
In this small sleep study, researchers gave 12 healthy people a supplement at three points throughout the day: Six hours before bed, three hours before bed, and right at bedtime. One of the supplements participants received throughout the day contained 400mg of caffeine (about the same as is in a Venti 20-ounce coffee from Starbucks)Ã¢â‚¬”but they weren't told which one contained the caffeine. Surprisingly, even the people who got a jolt of caffeine six hours before bed showed disturbances on a sleep monitorÃ¢â‚¬”cutting total snooze time by more than an hour!