Oral care

Mouthwash commercials sound certain. A Cochrane review of 44 studies is not. After checking tongue scrapers, gum, mints, mouthwash and toothpaste, the review found no intervention with reliable evidence behind it, low to very low certainty across the board. And in Japan, a country that has built dedicated hospital clinics and its own testing device for bad breath, the clinical literature says the same odd thing: machines are supporting evidence. The final call still goes to a person's nose.