I also suffer the same.
Our problems are internal and this is just a symptom. Our mouthes are an opening to the drains inside our body. So if the sewer stinks, our breath will surely smell. The smell originates from the imbalances, bad microbes and toxins in our body.
Ive been doing research and here is what I have come up with:
body cleanse/detox-> https://www.curezone.org/cleanse/liver/
Tumeric (powder) if you cook with it, it usually immediately removes all smell and flavor in your food!!! Imagine when you stir it in water and then drink it on an empty stomach. It is an old ayurvedic method because of its antimicrobial properties.
Fenugreek (powder) has a heavenly smell. It smells like maple syrup, when you ingest or drink this, this powerful herb invades every duct in your body and soon your Body Odor smells like maple syrup. No need to take baths with Clorox.
Oils!!!! Modern Science
has brainwashed the whole world into thinking that oils are bad for us and this is why we suffer from all kinds of medical problems today. Like a car, our body needs oil to run smoothly and empty all ducts, vessels and organs in our body. Even tunafish in oil as opposed to water, have less heavy metals because the oil "pulls them out. Do "oil pulling" for at least 5 min at the end of your day and watch the difference in your health. Oils are the CURE to everything. They are God's medicine to us! For the Asians, the best oil which has been prophetisized to cure anything is Black Seed Nigella Oil. The only thing it cant cure is death! LOOK for virgin and unrefined oils. Castor oil as in Tom and jerry is the closest in consistency to our lymphatic system. All oils can be taken by spoonfuls on an empty stomach and externally by being massaged onto specific body parts with a hot towel or water bottle over it. Do it and notice the difference in bowel movements etc!!!!
Ive noticed someone talk of Oil of Oregano. Here in Asia, we have abundance of Water of Marjoram which is excellent for the whole digestive system and other organs. But its dirt cheap unlike anything healthy in the West. http://www.herbwisdom.com/herb-marjoram.html
Whenever I travel to Egypt, I stock up on oils cause they are soo cheap. http://www.elcaptain-eg.com/=en/HTML/23.htm
These come with detailed pamphelts on what they can cure and how to have it which is usuallt stirred in hot drink sweetened with honey
REAL Natural Honey
ALL Greens- chlorophyll is an odor neautralizer, so eat up at beginning and end of your meals. Find chlorophyll at your nearest pharmacy.
SEEDS: All seeds cut and splice microbes and obstructions in your digestive system so eat up, even the ones in your grape, lemon or any fruit, don't be scared!
GINGER/CINNAMON/CLOVE: a basic to Asian cuisine. I know a very old woman who has freshly grated ginger juice every morning on an empty stomach, she looks younger than her age, healthy, fit with no medical problems, stock on this!
Drumstick/moringa tree- every part of this tree is a cure for something, google it..
Hope this was helpful.
As we try and make our efforts, only God can truly and surely help us. Half of everything is faith in Him.