Depending on the cause, natural cures for halitosis include using proper oral hygiene, avoiding tobacco use, drinking plenty of water to keep the mouth moist, and chewing sugarless gum or sucking on hard candies to stimulate saliva flow, states MedicineNet. Chewing on mint or parsley freshens breath as well.
The chlorophyll in basil and cilantro neutralizes odors, claims Everyday Health. Chewing on cloves, fennel seeds or aniseeds fights halitosis-causing bacteria.
If a medication is causing the bad breath, the prescribing doctor may change or discontinue the offending product, according to MedicineNet. If an underlying health problem is the cause of halitosis, treating that problem can cure the bad breath. Diabetes, chronic acid reflux, kidney or liver problems, and respiratory tract infections, such as sinusitis, bronchitis, postnasal drip and pneumonia, are some health problems that sometimes cause halitosis, notes WebMD.