Sleep is necessary to our survival. To be well rested, the average adult needs 7 to 8 hours of sleep each night, but the average adult only sleeps less than 7 hours a night.1 There are two types of sleep: rapid eye movement (REM) and non-REM sleep, which has three stages.1 There are many things that may effect the quality of sleep, caffeine being one of them. The effects of caffeine on sleep has been studied in many experiments.2-5 In all the studies, it has been found that caffeine alters the quality of sleep. In the study by Lloret-Linares et al., it was found that not only does caffeine alter the sleep quality but also increases sleep latency and the amount of nocturnal awakenings. Caffeine (3,5,7-trimethylxanthine) is a central nervous
