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coffee
coffee Coffee is a widely consumed drink that contains caffeine, a psychoactive substance that promotes wakefulness through actions on adenosine receptors involved in sleep regulation.
Coffee is a widely consumed drink that contains caffeine, a psychoactive substance that promotes wakefulness through actions on adenosine receptors involved in sleep regulation. In this psychology-related context, coffee is relevant because caffeine can affect sleep, although habitual coffee intake in one large cross-sectional study showed little relationship with usual sleep patterns or daytime sleepiness.