Too much soda??

Apparently according to some Greek researchers too much soda can cause a medical condition called hypokalemia. At first I was really concerned, because I love Coke Zero. I drink about a can, maybe two, a day. Then I read that the people studied drank at least 2 liters a day. 2 liters a day?! Holy cow! Those folks need some water as of yesterday. Sheesh! It just goes to show - everything in moderation!