Do you drink a lot of soda?  I used to be up to 6 cans of Diet Dew a day.
Mountain dew is a carbonated soft drink made by Pepsi, I used to drink it all the time! no more though, I've cut that out of my diet!
Unfortunately, me too. (love the carbonation)  I went cold turkey and went through severe caffeine withdrawal.  
The original Mountain Dew formula was developed in 1940! Yeah I drink fizzy water now!