I did a little research on the individual drugs contained in Ripped Fuel, and so far the info I have found seems safe enough. The first day I took it, I only took half the recommended dosage (one pill, three times a day) and didn't experience any real side effects. I decided the second day to go ahead and take the full dosage (2 pills, three times a day). The only side effects I experienced were a slight bit of nausea (which went away if I ate), as well as being extremely hyper, and also having an increased heart rate (from a norm of 52 bpm to around 100bpm). So far, it isn't enough to make me quit taking it. I've never had as much energy as I do when I take it. I haven't even been using it a week yet, so I can't really say anything about weight loss or any long term effects.