Melatonin-5Restores the body's circadian rhythm Helps increase total sleep time (sleep quality aspect) in people with sleep restriction or altered sleep schedules, e. g. shift work and jet lag. Helps prevent and or reduce the effects of jet lag (e. g., daytime fatigue, sleep disturbances) for people flying eastbound across two or more time zones. Helps reduce the time it takes to fall asleep in people with delayed sleep phase disorder. Helps reset the body's