Avoid a dry mouth
A dry mouth also called xerostomia [3] is another cause of bad breath and must be avoided if one has bad breath. When a person is dehydrated, the body won’t be able to produce sufficient. Saliva in the mouth clears out debris and without it, bacteria grows. This can lead to bad breath or worsen it. So, drink plenty of water and liquids, especially after doing any strenuous physical activity, like sports or exercise. Staying hydrated will ensure that the mouth is producing enough saliva which would help clear out the bacteria causing halitosis.
It is important to know that caffeine is not a liquid that should be used to stay hydrated. It is one of the things to stay away from. Instead, use Sugarless candies and gums for the job.