How does acid affect teeth?
Sugar acid - usually.
Sugar contains acid. Although sugar doesn't taste acidic, acids also contains teeth-eating bacteria that can create black hole in your tooth. Dentist research states that drinks or foods that has pH less than 5.5 can erode your teeth.
Usual acid effects that can take place in your teeth are:
1) When you throw up, your vomit contains stomach acid (pH 2) that can affect your teeth.
2) drink fizzy drinks (e.g coca cola, 7 up) with pH below 3
3) drink wine and beer (pH average 3.5)