1. Hot Drinks
People who often drink hot beverages usually have unhealthy teeth. Black tea and coffee contain tannins, which stain the teeth and lodge into the crevices and grooves of the tooth enamel. The tannins not only stain the surface of the tooth but also attract decay-causing bacteria.
It is better to consume hot drinks in moderation and add milk, which neutralizes the acids. Drinking more water also helps.