I have a 19 year old daughter who loves mountain dew. She drinks at least 3 cans a day. She is very active (plays college soccer) and claims that the soda doesn't effect her. I think that it is making her depressed and moody. She is also having problems with her teeth, bad headaches and bad stomach aches. We took her to the doctor where she was tested for the common things but all the tests came back negative. The doctor didn't seem too concerned about the mountain dew. My question is... what harm can mountain dew have on her body? Maybe you can help me convince her to quit!

Out of all of the sodas, mountain dew has a higher amount of caffiene in it than other drinks. It may have something to do with the caffiene , so try googling the negative effects of caffiene.