i finished up my first bottle a few weeks ago, and it burnt off quite a bit of fat, not all that i wanted, so im thinking about going back on it.
anyway, as long as you dont take it too late in the evening youll be fine. shit kept me up till 2 cuz i took it at 8 before a workout.
anyway, the label says that 4 pills is the maximum recommended dose of caffiene for an adult. so taking six would put you at 33% above max. recommended dosage of caffiene ( i think 200 mg). i wouldnt go up to six if four is working.