“Contrary to what you have learned or heard in the past, recent scientific studies conclude that the surface of the tongue is a major source of bad breath. More than 85% of bad breath originates from harmful oral bacteria on the tongue, not from the stomach, not from sinus infections, not from something eaten, but from the back of the tongue, a fertile breeding ground for the offensive foul odor germs.
In an article published in the Journal of the American Dental Association, the author sites numerous studies showing that bad breath originates from the mouth and it is caused by a specific type of bacteria on the back portion of the tongue More dentists than ever before acknowledge that bad breath originates from anaerobic bacteria on the tongue.
The surface of the tongue is one of the main breeding grounds for the bacteria that generates foul smelling sulfides and fills the mouth with noxious gases that smell like rotten eggs. Ordinary brushing fails to entirely dislodge these bacteria. Brushing actually tends to churn up and redistribute debris on the tongue, whereas scraping cleanly removes this debris in a few quick strokes.
Studies show that tongue cleaning is 700% more effective in removing bacteria than simply brushing your tongue with a toothbrush. Ordinary brushing fails to address bad breath. Many people gag when they try to get their toothbrush way back to reach the rear portion of the tongue where the majority of the decaying debris is lodged.
Brushing your teeth only reduces mouth odor by 25%. If you tried to clean the back of the tongue with a toothbrush, it would be ineffective and uncomfortable. In fact recent studies have shown an effectiveness of 20-30% bacteria removal with a toothbrush as compared to nearly 90% bacteria removal with a tongue cleaner.”