How much caffeine is a can of Monster Energy Drink?

If you look on the back of the can it says. It honestly depends on age, if your less than 12yrs of age, it is seriously not recommended you drink ANY type of energy drink. But say your a high-schooler, you can drink up to 5-a-day, your heart goes into rhythmacies, and it is likely you'll have severe heart problems with anymore that day. I've been sent to the hospital when I was 12 for "over-dosing" on Rockstar. I'm 13 now. Hehe...