Catch a serious toothache from one because it wore down your teeth or get severe heartburn and you'll understand how bad it can bes. Or keep drinking them cans of acid sugar water, and especially if you're black, get diabetes. Let's not forget possible kidney stones. I used to drink nothing but sodas and several a day at that and I had to cut them out early because of the heartburn and tooth effects I was getting. Some people can get away with drinking them just like some can get away with smoking all their life, but I'm not taking that risk.