fuck that shit, you get sleepy but its just because you body is racing out of control. The added ketofin is no good for me. I gave some to my buddy once and he took half and was like this clen is bunk. Gave him the other half and he feel through a display at best buy. He was jitter and could barely talk. Funny shit, but I don't like it. I going a thousand miles per hour then bame its over and ready for bed. But who wants to be like that for 2-3hrs.