Bad Breath?

[CherTLC4u]

Brush your tongue. The tongue, especially the back of the tongue, is a warm harbor for bacteria. When you brush your teeth, spend some time on the tongue, moving slowly toward the back so as not to activate your gag reflex. A tongue scraper used twice a day can also be useful.
Keep your mouth hydrated.

A dry mouth can lead to halitosis, so try snacking on oranges or celery, and drink plenty of water.

Freshen your mouth. Try an herbal palate cleanser such as parsley (chew on it after meals), peppermint tea, or cardamom seeds (chew, but don't swallow).

[tickletussler]

I find chewing sugar-free gum after meals help keep my teeth cleaner and the bad breath away, coz gum-chewing keeps the saliva flowing in your mouth. Other thing about chewing gum is that it also keeps your stomach juices going a little longer, so in some ways you also digest bit better.

[californiacasey]

My 2 cents:
Oranges are not allowed on the early rungs, and even sugar-free gum (like Extra) can have 2 carbs per piece.
Best best: bring your toothbrush to work and leave in a drawer. Brushing your teeth can also help avoid excess snacking.

[tickletussler]

You can get sugar free gum with sugar alcohols that can be considered as zero carbs, but it's still subjective at the moment as to whether the carbs in sugar alcohols are counted or not.