I just found out that for my weight, I would die from a caffeine overdose if I were to drink 230.53 cans of Diet Coke. (I'm assuming that's in one sitting--I'm WAY over that number if that's per week) Phew! Anyone who knows me knows that my limit is 200--225 if it's a real kick-ass party and I lose control, so I'm good. You can find out what your limit would be, given your caffeine delivery of choice (cola, coffee, cocoa--yes, cocoa has the evil substance, too despite what your seminary teacher told you, etc.) and your weight here.