Here are some natural remedies for bad breath:
1. Chew on a sprig of parsley, raw celery stick or mint.
2. Gargle peppermint oil in water.
3. Carry a small plastic container of spices such as anise, clove or fennel seeds, and chew on them after meals.
4. Squeeze some lemon juice and sprinkle some mint leaves (chopped) on a slice of ripe pineapple and eat it after meal.