Halitosis is often oral in origin, but non-oral causes like gastrointestinal disorders can contribute, especially when there’s no dental disease. Key digestive conditions linked to bad breath include Gastroesophageal Reflux Disease (GERD), H. pylori infection, gastroparesis, bowel obstruction, and small intestinal bacterial overgrowth (SIBO). Halitosis from digestive causes is sometimes accompanied by symptoms such as bloating, stomach discomfort, acid reflux, or irregular bowel habits.
Addressing halitosis due to digestive problems generally requires treating the underlying GI disorder, optimizing digestion, and supporting healthy gut flora. Sometimes, dietary habits (such as skipping breakfast, excessive consumption of onions/garlic, or alcohol) also worsen bad breath
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