Melatonin is a hormone produced by the brain in response to darkness and assists in the timing of circadian rhythms and sleep.
Though supplemental melatonin (the second most popular “natural” dietary supplement given to children after multivitamins, and not under the oversight of the FDA) is used to enhance “falling asleep”, “staying asleep” or both, to enhance sleep in children whose “body clocks” are “off schedule” and in children with developmental problems having sleep difficulty, evidence for its efficacy and safety is not sufficiently robust to be recommended by either the American Academy of Sleep medicine or the American College of Physicians.
The number of reports to US Poison Control Centers for children( <19 years of age) who took melatonin has increased from 8,337 (2012) to 52,563 over 10 years, with hospitalizations and serious outcomes (particularly in children <5 years of age) increasing significantly.
A Health Advisory from the American Academy of Sleep Medicine (AASM) suggests that parents consult with their pediatrician prior to giving melatonin (or any supplement!) to their child, and strongly advises that should melatonin be used, parents select a product with a USP Verified Mark.