On causes of bad breath

Generally speaking, bad breath (fetor ex ore) is a sign of lack of oral cleanliness and/or bacterial infection such as in tooth decay or periodontal disease[1], and if the latter, is best taken seriously since it reveals the presence of a large bacterial load ("morning breath") incl. plenty of cavity-causing bacteria such as streptococcus mutans. (In fact. Dr. Hulda Clark feels that bad breath in the morning is due to hidden tooth infections [revealed when the offending teeth are extracted].)[6]

Obviously, bad breath also may be caused by alcohol consumption, tobacco, diet (garlic, onions, sharp spices, sugar and starches feeding acid-producing bacteria), fasting (where the body's efforts at cleansing itself seem to typically include a thickly coated tongue) and even lack of saliva flow or dry mouth.

Saliva in addition to being a vital link in dental health maintenance and restoration (see Demineralisation/Remineralisation) is also nature's inbuilt mouth rinse that automatically washes odor-causing bacteria from your mouth.

In rarer cases, bad breath could be a sign of certain medical conditions (postnasal drip, tonsillitis, lung infections, sinusitis, mouth ulcers, digestive disturbances incl. insufficient stomach acid and constipation, and others (I've even seen liver and kidney ailments as well as diabetes mentioned).

Naturally, in all such instances, the topical and local remedies listed in the following will only work temporarily and the root cause needs to be addressed.

Other halitosis causes I have seen suggested include damage to the normal (non-pathogenic) microorganisms of the oral cavity from drinking chlorinated tap water and/or undergoing antibiotic (Tetracycline) treatment.

Another theory posits that bad breath is due to anaerobic sulfur-producing bacteria breeding within the tongue and throat and giving off malodorous volatile sulfur compounds.

Ironically even alcohol-based mouthwashes used to "freshen one's breath" can be a cause of bad breath, since the alcohol can dry your mouth out. Without proper salivary flow providing a self-cleansing action, bacteria as mentioned aren't washed away.[3]

Bad breath natural remedies

Specifically and since this site is about promoting simple, inexpensive DIY solutions to common problems (here: bad breath), for starters I will again come back to my favourite toothache remedy ...

Salt water against bad breath

Gargling and thoroughly rinsing one's mouth with a strong salt solution can work wonders for bad breath symptoms (removing "rotting" leftover food particles and likely killing off odour-producing bacteria which lie at the root of the unpleasant smell).

Probably due to the same bactericidal mechanism of action, I have seen salt water equally recommended for relieving a sore throat.

Variations of the salt water rinse can be made in any number of ways, for instance by adding lemon or using oil (for instance mustard oil) as the basis instead of water (also see Oil pulling).

Baking soda (sodium bicarbonate) against halitosis

Try rinsing your mouth with water and baking soda in the morning and at any time you would like to freshen your breath. Considering that it is a famous "mopper-upper" of bad or persistent odours, baking soda rinses (while less inexpensive than salt) should have a similarly or even stronger positive effect.

Baking soda, in addition to its many time-honoured applications, has indeed been used and recommended both for brushing teeth and for baths and mouth rinses, see More about baking soda.

Drinking water & hydrating your mouth

Since as mentioned above, bad breath can be caused by dry mouth (a dry mouth allows bacteria that lead to cavities to flourish[3]) simple water drinking can erase any traces of bad odour (and after rinsing seems like the obvious first-aid measure to take).

You can help to make sure that your mouth stays hydrated by chewing sugar-free xylitol gum or regularly "rinsing" with xylitol. Note: certain medications can cause dry mouth.[4]

Hydrogen peroxide (H2O2)

is another of the trusty standbys for a number of DIY health applications and works by eliminating bacteria.[2] Only use 3% (or even lower) food grade hydrogen peroxide for gargling (or make sure to properly dilute a more concentrated hydrogen peroxide or you might seriously hurt/damage your mouth, undiluted hydrogen peroxide is highly aggressive and not to be trifled with!).

Clean your tongue

gently but thoroughly and regularly of any malodorous films and deposits which may have accumulated (for instance during sleep), using a toothbrush, spoon or special tongue scraper. Simultaneously, you will likely have removed large amounts of cavity-causing bacteria from your mouth (see Tongue Cleaning).

Clean between your teeth (flossing)

Food rests trapped between your teeth not only are one of the main causes of tooth decay but can also cause oral malodour. Food remnants such as fibers (even from meat) tend to remain wedged between teeth, and brushing typically will not dislodge them.

Bacteria present in the mouth will eagerly use those rests as a source of food, and as they assimilate them, they also produce (smelly) waste products. If you regularly floss and rinse after meals, you may find your breath becoming fresh.

More at Interstitial Cleaning (Flossing).

Note: Somewhat depending on your particular dentition (wide or narrow spaces between teeth), simple but vigorous oil or water pulling (rinsing) as well as xylitol rinsing (see below) can also effectively clean the spaces between your teeth.

Oil pulling

This simple health practice has been credited with numerous cleaning and healing benefits, including cleaning up mouths who formerly suffered from "morning breath" etc. See e.g. this testimonial:

"My breath has become very pleasant in the morning. When I ran out of sesame oil and did not do my oil pulling, I did notice my breath becoming slightly smelly in the morning. This condition instantly reversed itself as soon as I started oil pulling in the morning again."

Another enthusiastic oil pulling convert reported that her breath was always fresh now after having tried "everything" to no avail — in spite of regular brushing, flossing, rinsing, many dentist visits for cleaning and even trying antibiotics, her halitosis previously had only gotten worse.

She does oil pulling first thing in the morning using organic cold-pressed coconut, sesame and sunflower oil.

In fact, a scientific study titled "Effect of oil pulling on halitosis and microorganisms causing halitosis" arrived at the result that oil pulling was as effective as chlorhexidine for bad breath and the associated microorganisms — which in light of the strong antimicrobial power of chlorhexidine is very impressive indeed. Compare Oil Pulling.


The natural sugar replacement xylitol has permanently improved people's "morning breath" and cleared coated tongues by suppressing cariogenic streptococcus mutans bacteria.

In addition to rather costly xylitol chewing gum and candy, the easiest and most economical way of benefitting from xylitol's cavity-healing properties consists in "rinsing" with it several times a day (without flushing with water afterwards) and leaving it in your mouth overnight. Details about xylitol and Rinsing with xylitol.

Raw green foods, parsley, coriander leaves, sage leaves & chlorophyll

Particularly when much of the odour comes from the lungs (such as after ingestion of garlic), I've found eating raw green foods and chewing parsley (chlorophyll apparently works as a natural deodorant) to be very effective and helpful.

A slightly more complicated recipe I saw suggested involved boiling parsley sprigs with ground cloves and using it as an effective mouthwash against unpleasant mouth odours.

If you grow your own wheatgrass or have it available in powder form (health food stores), you have another chlorophyll-rich food you can use against mouth odour. Spirulina, barley green etc. should work similarly. And indeed ...

Cayenne pepper for toothbrushing

Someone who used to suffer from inflamed and receding gums reported that after starting to brush her teeth with plain cayenne powder, all previous gum issues were resolved including "morning breath".

More on using cayenne for gum problems, infection and disease — scroll to "Cayenne pepper (powdered or tincture)".

Root parsley (Petroselinum crispum var. tuberosum)

This parsley variety (similar in looks to but different in taste than parsnip) is a popular ingredient in Eastern and central European cooking. Fresh root parsley, carefully chewed until "dissolved" (spit out the rest) can work quickly against bad breath.


I have read several reports of bad breath disappearing after the person began to regularly consume chlorella. (Also compare Chlorella Growth Factor.) In addition to the general benefits of chlorella intake, its high chlorophyll content is likely to play a role here.

Milk & dairy — friend or foe

A friend has told me that drinking milk "mopped up" all garlic odour from her mouth. (Somewhat relatedly, I have seen a "household" tip for removing odours from cupboards consisting in placing a pot of boiling hot milk inside the cupboard, which will absorb the odour.)

On the other hand, there are reports from people that milk or cheese consumption has induced bad breath and one person stated that after stopping the consumption of cheese and/or milk products, his or her bad breath was much reduced (s/he additionally used probiotics and had plaque removed by a dentist).

The different reactions may be due to differing bacterial populations in people's mouths.

Since dairy can produce excess mucus, also refer to "Sinus conditions" and "Intestinal cleansing" further below.

Urine rinse

Although certainly counter-intuitive, one person reported that swishing with a mouthful of midstream urine in the morning helped to prevent bacterial build-up in the mouth.

Uropathy in any case can be a very powerful dental healer, see Urine therapy for the healing of teeth and gum problems (and holding one's own urine in the mouth can actually be achieved quite "painlessly").

Activated charcoal

is a highly absorptive substance and "bound to bind" noxious malodorous substances in your mouth.

Clove (Syzygium aromaticum)
Fennel (Foeniculum vulgare)

Chewing cardamon, fennel or clove (the more the merrier) can suppress mouth odour (such as after meals). These seeds (or flower buds in the case of the cloves) are also easy to carry in case the need for a breath freshener arises while away from home.

Wormwood (Artemisia absinthium)

Pour 2 cups of boiling water over 1 heaped teaspoon of dried and cut wormwood, allow to steep for 15-20 minutes. Strain and use as a mouthwash 5-6 times a day.[7]

Chamomile (Matricaria chamomilla)

Pour 1 heaped teaspoon of dried and cut wormwood over 3 heaped teaspoons of dried camomile flowers, allow to steep for an hour. Strain and top up with boiled water to completely fill the cup. After each meal, carefully clean your teeth, rinse with 3/4 of the camomile water and drink the rest.[7]

Caraway (Carum carvi)

Pour 1 cup of boiling water over 1 heaped tablespoon of caraway seeds (fruits), allow to steep for an hour. Strain and use as a mouthwash 4-6 times a day.[7]

Apple cider vinegar

In addition to its numerous reported panacea-like qualities, apple cider vinegar also doubles up as an efficient mouthwash. Suggestion: dilute a teaspoon of apple cider vinegar in a cup of water and gargle (but since it is not easy on tooth enamel, caution is advised — or try mixing it with baking soda before use to raise its pH to tooth-friendly levels, or rinse with baking soda afterwards).

Cinnamon and honey rinse

Mix one teaspoon of honey and cinnamon powder each in warm water and gargle with this mixture in the morning. "Breath stays fresh throughout the day."

Echinacea & goldenseal (Hydrastis canadensis) powder

If the bad smell comes from a putrefying tooth (decaying tissue), according to herbalist Dr. John Christopher the blood-purifying and anti-putrefactive herb echinacea will eliminate foul odors and fetid discharges and arrest pus formation.

Suggestion: pack the tooth with herb powder, then seal with a cotton ball soaked in tea tree, mint or similar disinfecting oil.

(Rosmarinus officinalis, flowering tops or leaves)

Apparently rosemary can make an extremely effective mouthwash and may erase halitosis almost instantaneously. One suggested preparation of the herb would be to heat 1 pint of water, after removing from fire add 3 tsp of dried rosemary, cover and steep for half an hour. Strain and keep refrigerated.

Gargle and rinse with this decoction your mouth as needed. A simpler way (if available) is using rosemary essential oil.

Disinfectant essential oils

These can be very pleasant and help combat odour-causing bacteria. More

Sinus conditions

leading to thick mucus/phlegm discharge and bad breath may yield to herbal approaches, magnesium supplementation, hydrogen peroxide, removing dairy and other mucus-producing food, using a neti pot to clean the nasal passages (incl. with salt water), etc.

Intestinal cleansing, acidophilus

If the odour arises from the lower digestive system, ingesting probiotics such as acidophilus may be very helpful. Rather than going for expensive supplements, you may wish to use your own homemade probiotic yoghurt as a cheaper and much richer source of quality probiotics.

Certain herbs (such as Goldenseal) and of course intestinal cleansing, increased water consumption etc. all help to free the bowels and entire body from stored toxins. Author Erika Herbst for instance reports on a person who lost her bad breath after undergoing the Mayr cure cleanse.[5]

Various anti-bad-breath suggestions

Grapefruit seed extract (added to toothpaste), pranayama done in the morning, cream of tartar (Potassium bitartrate) (these as well as some of the above suggestions gleaned from earthclinic.com).

Also see Herbal and plant-based toothache remedies for germ-killing herbal preparations such as tea tree oil which will also fight bacteria causing bad breath, and make you even more lovable. :-)

How to make your bad-breath-fighting mouthwash taste (even) nicer

See the ideas and simple recipes for self-made breath fresheners under Natural herbal mouthwashes: making your own non-chemical, non-toxic breath freshener.

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1 Periodontal disease: a gum infection which can be caused among other things by the accumulation of plaque (refer to Dental Care & Oral Hygiene for many cleaning suggestions, natural home-made mouthwashes, flossing etc.).

2 See for instance Hydrogen Peroxide (H2O2) and baking soda permanently heal periodontitis after surgery fails.

3 Compare Dental health prerequisite number 5: proper salivary flow.

4 More at Dry mouth (xerostomia): On causes, remedies & treatments of inadequate natural production of saliva.

5 Background on this effective cleanse popular in German-speaking countries under Dr. F.X. Mayr’s research into the link between dietary habits, thorough chewing, intestinal/digestive function and health & beauty.

6 Compare Dr. Hulda Clark on dental detox.

7 Mouthwash remedy found in the book Russische Volksmedizin (German translation of the Russian original) by Dr. Natalya Alexandrovna Novikova MD.

More on dental care