caffine is just fine, soda is considered bad only because its empty calories, much like other junk food. In other words, you could be consuming other food calories containing other nutrients instead. all things in moderation.
soda does not dehydrate you, thats an old wives tale. caffine is a dieretic, but only for those who never consume it, in other words you build up a resistence. think logically, you don't drink soda and h20 mysteriously dissapears
what makes diabetics is eating too much

sugar is sugar, so eating rice and pasta will do you in as well
