Side Effect 2: Hypothermia and Hormonal Imbalance
Excess melatonin can result in hypothermia, as melatonin release causes the body temperatures to decrease and stimulate overproduction of another hormone, prolactin. Excess of prolactin is known to result in hormonal problems along with liver and kidney issues in men. The US FDA identifies melatonin as a dietary substance and therefore, its packet does not have warning signs of overdose risks. This classification also allows companies to sell melatonin supplements at variable doses. More importantly, people should remember that melatonin is a hormone. If it is taken by children, it can adversely affect normal hormonal development, onset of puberty and regularity of menstrual cycle.