However, the woman's partner and mother-in-law say warning labels should be put on the drink.
An inquest for mother-of-eight Natasha Harris was held in Invercargill yesterday. Harris died on February 25, 2010.
Otago-Southland coroner David Crerar did not make any preliminary findings after yesterday's inquest, however pathologist Dan Mornin said he believed Harris died of cardiac arrhythmia and it was likely she was suffering from hypokalemia (low potassium) along with caffeine toxicity, which could have contributed to her death.
When asked by Crerar whether it was probable her consumption of Coca-Cola had caused the hypokalemia and arrhythmia, Dr Mornin said yes, along with poor nutrition and caffeine.
At the inquest, Harris' partner, Chris Hodgkinson, said his partner consumed between 4.5 and 8 litres of Coke a day for several years before her death, and he believed this had contributed to her death.