Certain foods, health conditions and even habits can contribute to the existence of halitosis (bad breath).

Food:

Food starts the process of breaking down in our mouth when the teeth start to break chunks of food that have been bitten into smaller pieces by biting, tearing and chewing. Food particles can be trapped in between teeth, which can cause foul odor. Food also can contain oils that can be another source of bad breath. Certain foods like onions and garlic are good examples of foods that cause bad breath. Others are vegetables and spices. The oils in foods are first digested and the pungent oils are absorbed into the bloodstream. Then they are carried to your lungs where they are given off in your breath when you exhale, until the food is eliminated from your body.