What causes bad breath?
2,706,158 views | Mel Rosenberg • TED-Ed
Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? Mel Rosenberg outlines the basics of bad breath — and what you can do when it strikes you. [Directed by Andrew Foerster, narrated by Addison Anderson, music by Devin Polaski].