Experts have issued a warning against drinking large quantities of cola, saying it could lead to muscle problems, an irregular heartbeat and bone weakness.
The number of cola lovers suffering health issues is on the rise, they said, adding there had been a food industry push towards an "increase in portion sizes".
As well as tooth decay, diabetes and "softening" of the bones, doctors have seen patients suffering from hypokalaemia where potassium levels in the blood drop too low.
This can increase the risk of muscle problems and heart rhythm abnormalities, which could prove fatal in some cases.
"We are consuming more soft drinks than ever before and a number of health issues have already been identified including tooth problems, bone demineralisation and the development of metabolic syndrome and diabetes," said Dr Moses Elisaf, from the University of Ioannina in Greece, who led an academic review of the issue.
"Evidence is increasing to suggest that excessive cola consumption can also lead to hypokalaemia, in which the blood potassium levels fall, causing an adverse effect on vital muscle functions."
updated 30 Jun 2009