How do you tell a co-worker he has really bad breath?

bad breath
Carole asked:

He isn’t particularly well liked at work, but he is a supervisor. I would want to be told if I had the problem. Since no one here likes him much, its kind of a funny thing to bag on him for. He is a supervisor too, so I am afraid to bring it up. He may take it as disrespect or an attempt to embarass him.

Rapid Cure for Bad Breath