Brush the teeth and, very importantly, the tongue and floss once per day.
Take calcium, C vitamins, B-complex, and the herb myrrh daily as a preventative measure.
Take acidophilus or chew uemboshi plums to improve intestinal health.
To merely cover odor, chew cloves, drink peppermint tea, eat parsley, take chlorophyll, or gargle with barberry tea.
Chew food well and drink water between meals to aid in digestion.
Rinse with a glass of water and the juice of half a lemon after each meal.
Chew on some cardamom seeds.
A cleaned colon will often alleviate bad breath.