Although melatonin is generally safe for short‒term use, some users experience side effects such as drowsiness, headaches, dizziness, and nausea.1
Adding to the concern, one study found that 71% of melatonin products tested had inaccurate dosing, with some containing nearly five times the amount listed on the label.2
This inconsistency increases the risk of side effects, especially in children, where melatonin overdoses have increased dramatically (+530% in the last decade.3)