t want to contradict mammo , there is another major problem, which is overlooked, could be due to individuals that have dry mouth, who usualy also have a slow digestion, and when you drink milk or milk products, will have bad breath
. You must have a big cavity, that food gets stuck in it , to give you bad breath
. Also a crown, that the cement is partially gone, brush and floss cannot get to, also can give you bad breath .