Stop!!! Today, right now! STOP drinking them! They're not good for you especially if you're in your teenage years. You already have energy. In fact, I wouldn't recommend it to anybody at any age. The caffeine in these drinks can kill you. Yes, too much caffeine can kill you! Don't even dare mix them with alcoholic drinks. You're digging yourself a grave. Let me tell you a itty, bitty story about how I used to work in retail, and I was in charge of scanning in the merchandise that was sliding through the conveyor belt from the truck driver. The truck driver threw in a 24 pack of Monster drinks onto the conveyor belt headed straight at me for scanning. One Monster aluminum can popped out of the thick plastic wrapping and splashed on the dark, cemented floor. After cleaning the floor the splash mark stayed on the that floor to remind us of that morning. Imagine if it does that to a floor?? What does it do to your body?? Your organs?? Just...stay away from it! :)