How Do I Prevent Bad Breath?

From WikiBody - The Owner's Manual For Your Body

In approximately 90% of cases, bad breath (or halitosis) comes from the bacteria in the mouth that feed on leftover food particles. So, practicing good Oral Hygiene is essential to preventing bad breath.

In particular, tongue cleaning is very effective at preventing bad breath because the majority of bacteria in your mouth reside on the back of your tongue. There are various tongue scrapers on the market.