red bull seems to have no effect on me?!
Answers:
First of all, I'm sure that you know you should not be drinking that much pop. You are overweight and are looking down the business end of diabetes. I would hate for that to happen to you at such a young age.
However, I have been drinking coffee my whole life, one cup every morning. I tried Red Bull - nothing. Our tolerance for caffeine is higher than most others.
red bull does is not suppose to make people hiper crazy just to wake you up but if you already drink 4 can of soda that is almost the same as one red bull you may have develop a tolerance to the caffeine