Drinking too much soda is bad for you, but can cola actually kill you? Apparently so. A 31-year-old New Zealand woman died following a cardiac arrhythmia which the coroner blamed on her 2.2 gallon-a-day Coca Cola habit:
Her family called it an "addiction" that resulted in the removal of multiple rotten teeth and the birth of at least one child lacking tooth enamel; her partner said Natasha Harris suffered withdrawal symptoms if she didn't drink the stuff. [...]
The examination after her death revealed an enlarged liver with fatty deposits due to too much sugar, a pathologist said. Low potassium in her bloodstream may also have been linked to the soda.
Harris apparently consumed more than two pounds of sugar and 970mg of caffeine a day; experts say even 500mg is dangerous.
Coca-Cola said it was "disappointed" about the coroner's emphasis on Coke in Harris' death, though his report did state that the company "cannot be held responsible for the health of consumers who drink unhealthy quantities of the product."
I would call that an addiction.
http://en.wikipedia.org/wiki/Water_intoxication
I'm more concerned about the people who slam down 6-10 'energy drinks' a day which have as much caffeine as killed this girl in far smaller volumes of liquid...