No offense, but it sounds ridiculously unhealthy. Once you start working out, you'll find that you'll have your own natural energy and you won't need any supplements.
its not reaally a "supplement" its more of a pre-work out powder you mix with water or whatever
its pretty much concentrated Caffene, with other energizing substances
its VERY VERY VERY VERY VERY x10000000 Strong
i remember the first time i tried it, i had two Very small scoops, i felt like running 5 miles to the gym, working out for 5 hours, then running all the way back!!! it gave me rediculous amounts of energy
Remember the movie crank? yeah thats how your going to be like
I recomend it during the day and not the night as you WONT be able to sleep,
and only use it if your going to serious about going to the gym
and its quite the diuretic!
Why the HECK are you spending that much time in the gym? Do you realize that you are probably doing more harm than good by not allowing your body any recovery time? Unless you are some sort of distance runner (and you are running the whole time) there is no reason to be spending that much time in the gym. Losing weight is a matter of calories in vs calories out. Diet is the best way to control your calorie intake/output, while exercise can help increase a caloric deficit. Exercise can also be used to increase strength and endurance.
If you are spending 2-4 hours a day in the gym and you are no losing any weight, or you are losing it slowly you need to take a very hard look at your diet. Do some research and figure out what your basal metabolic rate is, and how many calories a day you need to sustain your BMR and your activity level, that will get you your maintenance calorie amount, or how many calories you need to eat a day to stay exactly where you are right now. Once you have that number you can figure out how many calories you should be eating a day in order to lose weight. You need to be careful not to set your calories too low, or else you risk running into other problems, like poor recovery, fatigue among other things. The number I've been quoted by my doctor is reduce your calories by no more than 10-20%. So if your maintenance calories are 2000 cal/day, subtract 200-400, giving you 1800-1600 cals a day to lose weight.
You can also increase your deficit through exercise, but your total calorie intake still should not drop under that 10-20% level. So if you are eating 1600 cals a day, and burn 200 calories in the gym, you need to eat an extra 200 cals to stay at the 20%.
If you are taking 3-5 scoops of Jack3d you need to lay off. Seriously, for the sake of the health of your heart, taper off of it. There are significant levels of caffeine and other stimulants in one scoop of that, and the manufacturer states you should take no more than 3 scoops in 24 hours.