Jarrow FORMULAS Sleep Optimizer combines herbs andamino acids that work together to facilitate falling asleep and maintaining a regular sleep cycle.* Gamma-aminobutyric acid (GABA); lemon balm; and L-Tryptophan promote relaxation.*The combination of valerian and hops flower has been studied for its effect on reducing latency (the delay before entry into sleep).* Melatonin is a hormone; secreted by the pineal gland that controls the biological clock and signals the entry into sleep.* Our biological clock can be disturbed by stress; crossing time zones; and changing work shifts.Keep out of the reach of children.