Actually, those who drink diet soda (only) are more at risk of becoming obese. This is directly linked to the soda.

http://www.webmd.com/diet/news/20050...in-more-weight

I know that Drs Oz and Mehmet have explained how the chemicals in the carbonated diet drinks mess up the system and cause weight gain, also.

To each his own, you know?

The fact that the guys who put the carbonation into soft drinks have to wear HAZMAT suits is rather a deterrent to me.