Been on it for 2 weeks now. 2 scoops a day at different times. I feel more alert & have more energy. Been stacking it with craze, but I think the combo, in a strange way, cancels out the strength of craze. You would have to try it to know what I mean. I stacked alphamine & alcar last Friday night & felt great for a while.. Got a little dizzy, but it went away.