3. Added Sugar
The bitterness of the drink is reduced with sugar. We put refined sugar to make your coffee less bitter. Caffeine combined with sugar has twice as many bad properties.
4. Teeth Staining
Stains on your teeth can appear if you eat chocolate, drink red wine, tea and coffee. If you want your teeth to be white, quit consuming the mentioned products. Whitening procedures are effective, but they damage your enamel. The thinner the enamel, the more sensitive your teeth become and the more prone to staining they are.