pure encapsulations best-rest formula | supplement to support the onset of sleep and sleep quality* | 120 capsules pure encapsulations this blend provides support for occasional sleeplessness. it contains the time-tested support of valerian, passion flower, chamomile, lemon balm and hops, which act to calm and relax the central nervous system. double-blind trials involving valerian, valerian/lemon balm combinations and valerian/hops combinations have indicated the potential to support the onset of sleep as well as healthy sleep quality. melatonin also facilitates the onset of sleep and sleep efficiency. gaba and l-theanine are included for their ability to promote alpha wave production in the brain, an indication of relaxation.*