Association Between Caffeine Consumption and Sleep Quality

Abstract

Caffeine is widely consumed in beverages such as coffee, tea, soft drinks, and energy drinks and may influence sleep patterns and overall sleep quality. This study examines the association between caffeine consumption and sleep quality among adults. Caffeine intake is assessed through frequency, quantity, timing of consumption, and common dietary sources. Sleep quality is evaluated using sleep duration, sleep onset, nighttime awakenings, daytime sleepiness, and overall sleep satisfaction. The findings suggest that higher caffeine intake, particularly during the evening or close to bedtime, is associated with delayed sleep onset, shorter sleep duration, and poorer perceived sleep quality. Frequent consumption may also contribute to daytime tiredness when normal sleep patterns are disrupted. In contrast, moderate intake and avoidance of caffeine during late hours are associated with more favorable sleep outcomes. The study highlights the importance of appropriate caffeine timing and consumption habits in supporting healthy sleep among adults.