Caffeine consumption may reduce sleep quality regardless of timing

Research from the University of Wrocław indicates that caffeine consumption can disrupt sleep quality regardless of the time of day it is consumed. A study published in the journal ‘Nutrients’ utilized electroencephalography (EEG) scans to analyze brain activity during sleep, providing more precise data than standard sleep duration assessments.

Dr. Donata Korpas, a family medicine specialist at the University of Wrocław, noted that EEG allows researchers to observe how the brain sleeps. The findings revealed that even when individuals sleep for the recommended eight hours, caffeine can significantly reduce slow-wave brain activity, which is a critical indicator of deep, restorative sleep.

While many people attempt to avoid caffeine in the evening to prevent insomnia, the physiological effects of caffeine can persist for hours. Experts suggest that the ideal time to stop caffeine intake varies by individual, depending on personal sleep schedules and metabolic rates, rather than a universal rule.