To treat bad breath using apple cider vinegar you can do it two ways.
The first way is to take one tablespoon of apple cider vinegar prior to eating each meal.
The other way of treating bad breath with apple cider vinegar is to mix a tablespoon or two of apple cider vinegar with a glass of water or glass of tea and drink it after your meal.
The apple cider vinegar will help you digest food easier and faster and kills off bacteria that causes bad breath.