Mountain Dew vs Coca-Cola: Which soda is worse for your teeth?
This is somewhat surprising. Check out the video of this young scientist testing these sodas on real teeth.
Either way, we'd add one caveat -- after drinking or eating anything with high acidity, do not brush your teeth immediately after, as it will further damage tooth enamel. Instead, drink water to wash the acid away and then wait about 30 minutes to brush.