Maria
If nothing works, the bad breath can be cause by gum disease or Helocobacter Pyroli (in the stomach). Look for it asking GP for relevant tests. Usually people have above all other different symptoms like (tiredness, bloating, ulcers, stomach cramps/pain, lost/gain weight, nusea, bad digestion, different stools) have also bad breath. Bad breath can also be cause by Zink deficiency!!! Other serious problems related to it are: cancer, tuberculosis, dehydration. Some drugs also can cause bad breath (lithium, penicililamine, etc) -ask GP. Usually the following should help: - eat meals 3 times daily and drink plenty of good water- wash ofter your mouth/teeth/tongue- chew mint gum- use certain herbs and spices (cloves, fennel, anise seeds, juniper berry)- avoid garlic- eat lots of parsley-avoid strong cheese-avoid coffee/tea/wine/alcohol.