Melatonin is a hormone and doctors are starting to sound the alarms because parents don't know what melatonin is and they're being mislead by these companies. These companies that ARE NOT regulated by the FDA because hormones are not food and they are not drugs.
Yes, you can overdose on melatonin. You won't die but it will f--k you up and you'll wake up with a headache from hell! If you've taken melatonin and woke up with a headache, it's because you overdosed on it. The dose you took had WAY TOO MUCH of the recommended hormone dosage.