I'm sure you know that your favorite fizzy sugary elixir is not doing a thing for your waistline, but did you also know it's rotting your teeth? You might think it is the sugar, but you would be wrong. Sodas rank high in acidity, and when it comes to your mouth, that acidity can speed up the development of cavities.
Here's the deal. Teeth become susceptible to cavities when the acid level of your saliva falls below a certain point. If the acid level stays below this point for an extended period of time (like if you are drinking soda all day), the outer layers of your teeth begin to lose minerals and a cavity can form.
The phosphoric acid in soda (which is no good for your bones as well), which is what keeps it nice and bubbly, dissolves the calcium out of your teeth's enamel, leaving them soft and unprotected. Sugar-free sodas aren't the answer, since they still contain the same amount of damaging phosphoric acid.
Fit's Tips: When it comes to your teeth, the worst thing you can do is to sip soda throughout the day. If you're not ready to give soda up completely, try and drink it at one sitting with a meal, and when you're done, immediately rinse with water.