Source Naturals NightRest with Melatonin, 200 Tablets /bottle* Just received it less than a week ago. This is absolutely not effective for me. For 3 nights consecutively I took 1 tablet /night around 30 minutes before going to bed. Awake all the same without any sign of wanting to fall asleep. Fed up and have had to take other type of sleeping aid, by then its was almost wee hour. Thus the whole process could not help me at all. However, I have not tried to take 2 tablet /night yet. As I am reluctant to decide on taking more of it going to bed.