Death by caffeine

[image error]If you've ever wondered how much caffeine it would take to kill you (and I know you have) there is now a handy online calculator that lets you enter your body weight and caffeine source to find out how many energy drinks, coffees, teas or bars of chocolate would be needed to cause your teeth-chattering demise.

It's a little bit basic, as a 'friend' would like to be able to factor in any caffeine tolerance already developed, and perhaps understand whether...