I have halitosis for several years now. My dentist told me I don t have any gum disease. my ear, throat, and ... told me Im ok, he referred me to a gastroenterologist . a few weeks ago, I undergone biopsy to ruled out malabsorption and acid reflux, result all negative. every doctor I went to see told me they don t see nothing that could cause my problem. I ask stranger about my breath and they confirmed what my friends told me. any suggestions, Please help!!!