I watched a TV show called Freaky Eaters on TLC and they had a segment on a 20 year old woman who drank 30 regular cans of cola per day. She drank and drank and drank and was thin as a rail. Some professionals were called in and they tested her blood glucose and she was already pre-diabetic. I guess you can eat yourself into diabetes? BTW, the woman didn't change her habit, she said she was not worried yet.