The hormone melatonin helps control your natural sleep cycle. The levels of melatonin in the blood are higher at night, some research suggests that melatonin supplements may help in treating the syndrome of timetable change or reduce the time that takes to fall asleep – although the effect is typically mild. Melatonin may be more effective for other types of sleep problems, such as delay of sleep disorder or disorders that affect heart rate.
The most common side effects of melatonin include:
Drowsy during the day
Other less common side effects of melatonin may include abdominal discomfort, mild anxiety, irritability, confusion and short feelings of depression.