If your breath smells like you've been chomping on sardines all day, listen up! According to the Academy of General Dentistry (AGD), over 90 percent of bad breath originates in the mouth, throat, and tonsils. The main reason bad breath kicks in is thanks to bacteria in your mouth that feeds off of the particles of food that are stuck between your teeth and have been sitting there for hours. Now, here's how to kick bad breath to the curb...