A new study surprised researchers when it found coffee can lead to good breath . Researchers at the University of California San Francisco and Harvard Medical School studied more than 1,000 people who were asked about their drinking habits over a period of two years. `` That will take a long time '' said Rosenberg . The lead researcher is now thinking about creating a coffee-based mouthwash .
A new study surprised researchers when it found coffee can lead to good breath . Researchers at the University of California San Francisco and Harvard Medical School studied more than 1,000 people who were asked about their drinking habits over a period of two years. The lead researcher is now thinking about creating a coffee-based mouthwash .