Caffeine and Teeth

[Pong]

Although caffeine drinkers, particularly coffee drinkers, may find over time that their teeth develop brown stains, the problem is not the caffeine. Rather, it is the dark liquid itself that changes tooth color. Even non-caffeinated colas can cause staining.
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[coreline]

as long as you keep brushing your teeth before go to bed and keep seeing your dentist, it won't be a big problem