Solutions for a bad breath. Suggestions! How to tell him?

bad breath cures
No Drama asked:

One of my best friends has bad breath. It is not that bad but sometimes it is.
Today he was talking about it and told me:
I´m sure, if I had bad breath you´ll say it to me and you suggest what to do. I was totally silent and didn´t know what to say.
Tomorrow I want to tell him very politely but PLEASE do you know some way to cure it…
PLEASE some advices to avoid bad breath.
Thanks in advance.. any clue will be appreciate..
Thanks to everyone.
Great advices..
I talked to him and he is working on it.
It´s hard to choose a best answer… 4 or 5 of them are good enough.
Let´s see which one is favorite by voters.