Levels of bacteria.

The researchers then took samples of saliva and layer of the tongue to measure levels of bacteria and components that cause the smell, including hydrogen sulfide The volunteers ate 90 grams of yogurt each day for six weeks. At the end of the study, researchers took samples again. They found that levels of hydrogen sulfide had fallen by 80% of the participants. Levels of plaque and gum disease, gingivitis, were significantly lower among those who ate yogurt. Dr Nigel Carter, chief executive of the British Dental Health Foundation, said his organization "takes time recommending to people the benefits of yogurt without a thrill as a healthy snack, so it is good to know that any benefits from oral previously unaware ".