Why soda pop is bad for you is because the acid will rot your teeth. One swallow of pop will launch a 20 minute attack on the enamel on your teeth. Also, the sugar in pop will contribute to weight gain. Of course, that is dependent on how much pop you drink per day, that will vary in each individual. If you want to see the effects of acid in pop, buy a coca-cola, shake it up, and spray it on the windshield of your car. You will see it eats bugs and road grime from the windshield. Imagine what that does to your teeth. The acid in pop also causes problems with your intestines and can cause diarrhea. If you have stomach issues, stop drinking soda for a month and watch the result. I guarantee your stomach problems will lessen.