I don't think I have halitosis, but how would one know? If I don't eat and hydrate, I notice it can happen. Lately when people close talk to me, I am always backing off because they have bad breath. It seems like it's a common problem that effects almost everyone. Good dental hygiene can help, stay hydrated with non-sugary drinks, don't eat smelly foods! Oh yes, and tongue brushing is a great tip!