There are 5 main reasons why the levels of VSC-producing bacteria in our mouth can increase to a level that causes bad breath:

1. Dry Mouth:

A dry mouth (xerostomia) can contribute to bad breath for 2 reasons:
1. Saliva washes away both particles of food and VSC-producing bacteria. It there isn’t enough of it, food particles will remain in the mouth and rot, and bacteria will remain to feed and multiply (and emit VSCs).
2. Saliva contains high-levels of oxygen which, being anaerobic, the VSC-producing bacteria don’t like. If there isn’t enough saliva, oxygen in the mouth is reduced, which allows the bacteria to hrive, and produce even more VSCs.
Sometimes, dry mouth can be caused by medical problems (such as radiation damage) and, in such cases, you should consult with your physician to determine the best course of action. Many other cases are caused by smoking
and alcohol, both of which have a severe drying-effect on the mouth.
However, the biggest single cause of dry mouth is something much simpler: You’re not drinking enough water! Your body is mostly made up of fluids – water, to be exact. In fact, more than 75% of it is nothing but water. And 85% of your brain is nothing but water too.
Water is so vital because it’s directly involved in most, if not all, of the activities that your body performs to stay healthy and alive. You wouldn’t live 10 days without it; perhaps not even that long.
And, every single day, your body flushes 3-pints of it out through your kidneys; another pint as sweat; and yet another pint through your breathing. (Dry mouth only comes later; you’re already very lacking in water by the time
your mouth feels dry.) That’s why you have to replenish it every day.

Yet few people actually do that – chronic dehydration is one of the most common physiological problems in the entire world. That said, there’s more to re-hydration than just drinking water. You might think: “Okay, I know now that I should drink water; that’s all I need to know.” But you knew that all along. What you didn’t know is that your body isn’t a container that you can just re-fill when it’s empty. When you are chronically dehydrated (as most people are, to some extent), reversing it takes time and understanding.

You also need to know the role salt plays: doctors are dead wrong to give instructions to eliminate salt from your diet; this ‘forbidden’ substance is absolutely crucial to re-hydrating your body. You have to understand what you can and cannot do; how much water and salt to take; and when to take it.

Giving complete instructions on this would take an entire book by itself!

However, for the purposes of beating your bad breath problem, the following will work wonders:

Begin re-dressing the balance by drinking those 4- pints of water you’re losing every day through your kidneys, lungs, and skin. Do that by gradually replacing every can of soda, every cup of coffee, and everyglass of alcohol you would usually drink with plain water. (If you want to learn how you can re-hydrate your body, and see dramatic improvements in your general health, as well as many specific health conditions, I recommend you get a copy of a book called “Your Body’s Many Cries for Water” (available on Amazon.com). This amazing little book has been reprinted 21-times, translated into 15-languages, and continues to educate readers all over the world, more than 17-years after it was first published. It was written by the late Dr. Fereydoon Batmanghelidj, an internationally-renowned ranian doctor, who studied under Sir Alexander Fleming (who shared the Nobel Prize for the discovery of penicillin) and its contents have been scientifically peer-reviewed and presented at different national and international medical conferences – and published in scientific journals.)