It is not bad breath. Is a fecal, rotten egg, garbage odor that comes out when I breath out, via nose or if I hold my breath and breath thru my mouth. It would get worse with food I ate instantly. I have gotten tested for a lot of things and all comes up negative. My significant other hasn't complaint about my breath but have asked before just riding in the car with windows up and air on if I had farted. Or complaint about a smell in the air but I know it is from me. Is seems to be a gas that came out suddenly and I would identify it as coming from within me. I know that because for years I have suffered from it. I tried the liver cleanses. Detox, shakes, pills, powders, digestive pills, probiotics, etc. Odor would diminish but not disappear completely. I would smell this odor every morning, some mornings more than others. And usually when riding my car and air hit my nose. I'm not sure if my body is not breaking down carbs or proteins or what it is. I just hope it's resolved for good.