Re:BSN Atro-phex fat burner sides? )))
It is because it is full of stimulants. The effects you are describing are not 'side effects', they are just the effects of taking stimulant based thermogenic aids, it is the whole point of taking them. The only benefit such a product will give is to give you increased energy (from the stimulants) and appetite suppression (from the stimulants), both of which make the caloric deficit required for fat loss (which I presume your diet is geared towards) more maintainable. So they may indirectly aid fat loss, but substantively will add nothing to your fat loss. If you want a fat burner that actually works as a thermogenic aid you will need to go under the counter - ephedrine, clen, etc. The general consensus is that over the counter 'fat burners' (the very name is a total non-sequitur by the way) don't work - some may argue with this proposition, but those people are more likely than not supplement company reps.