I bought the Energy, Calm and Sleep powders and they all taste terrible. It is very difficult to drink them. I tried the Sleep powders for several nights and it did not help at all. As a matter of fact, it made me get up to pee more often, essentially making my sleep habit worse. The Calm powder also did nothing it says it does. The Energy powder seems to work somewhat. I do not feel tired during the day and do not get jittery like coffee or energy drinks can do at times. The cost is way to expensive, so I will not be buying any of these products again. I had to throw the rest out because the taste terrible and I could get better results with other products for half the cost.