Davinci Laboratories Sleep Tight supports healthy sleep, normalizes circadian rhythms (or slee/wake cycles), protects against exposure to electronic devices at night, maitains social and verbal skills, cognitive health, and mental focus. Melatonin is a hormone that leads to anight of peaceful slumber. It promotes sleepiness, deep sleep, and dreaming. The body releases melatonin when it is exposed to darkness, but too little natural light in the daytime can interfere with melatonin cycles. When melatonin levels drop, children will not get enough sleep, and are going to be tired and irritable. Melatonin also supports healthful sleep, supports pleasant interactions with family and friends, and boosts communication skill. Cognitive performance, mental health, and attention span are also linked to restful sleep. Recommended Use: Children 4 or older hold nozzle 1 inch from mouth, spray twice and swallow, or as directed by a healthcare professional. Shake well before each use.