The first layer is fast-acting and contains 2.5 mg of melatonin, while the second layer is designed for extended-release and also contains 2.5 mg of melatonin. Liquid melatonin is an excellent ...

My body's adverse reaction to melatonin seems to defeat the purpose of taking it in the first place: to feel more rested during the day. I decided melatonin is not the best sleep supplement for me.