Caffeine's Nighttime Brain Drain: How It Disrupts Sleep and Varies by Age

A University of Montreal study reveals caffeine not only keeps you awake but alters brain function during sleep. EEG analysis showed caffeine increases brain signal complexity, pushing the brain towards a 'critical' state – beneficial for daytime focus but disruptive to nighttime rest. Caffeine weakens delta, theta, and alpha waves associated with deep sleep, particularly during non-REM sleep crucial for memory consolidation and cognitive recovery. Younger adults showed greater sensitivity to these effects. Published in Communications Biology, the research highlights the importance of understanding caffeine's age-dependent impact on sleep.