Oil Pulling for Bad Breath: What the Research Actually Says

Oil pulling has been around for a long time. It comes from Ayurvedic medicine and involves swishing oil around your mouth for several minutes, then spitting it out. In recent years it’s gotten popular as a natural alternative to chemical mouthwashes.

The question worth asking is not whether it’s ancient or natural. The question is whether it works.

What Oil Pulling Is Supposed to Do

The traditional claim is that swishing oil “pulls” bacteria and toxins out of your mouth. The more plausible modern explanation is that the mechanical action of swishing dislodges bacterial colonies from tooth surfaces and mucous membranes, similar to how any liquid rinse works. Some bacteria are also lipophilic (attracted to fats) and may get trapped in the oil.

Coconut oil is the most common choice today. It contains lauric acid, which has some antibacterial properties in lab settings.

What the Research Shows

There are several small clinical studies comparing oil pulling to chlorhexidine mouthwash and to sesame oil (the traditional choice). The findings are moderately positive but limited.

A few studies have found that regular oil pulling reduces counts of Streptococcus mutans bacteria and reduces plaque scores, with results roughly comparable to chlorhexidine mouthwash. Some studies specifically measuring VSC levels (the gases responsible for bad breath) found modest reductions after several weeks of daily use.

The honest caveat: these studies are small, often not well controlled, and sometimes funded or conducted by researchers with prior interest in traditional medicine. The effect sizes are real but not large, and the comparisons to standard mouthwash show roughly equivalent results, not superior ones.

What It Won’t Do

Oil pulling will not replace brushing. It does not remove the calcified plaque (tartar) that builds up on teeth. It doesn’t get into the pockets between teeth and gums where the most odor-producing bacteria in gum disease patients live.

If you’re using it as your only oral hygiene practice, you’re going to have problems. If you’re adding it to an already solid routine, the incremental benefit is modest.

The claim that oil pulling “detoxifies” the body or improves systemic health beyond the mouth is not supported by any credible evidence. Stick to evaluating it as a mouth hygiene tool.

Who It’s Reasonable For

Oil pulling makes the most sense for people who want to avoid alcohol-based or chemical mouthwashes and are looking for something to use as a rinse. If you’re someone who can’t tolerate the burn of conventional mouthwash, or if you’re pregnant and cautious about ingredients, or if you just prefer a more minimal product list, oil pulling is a reasonable option.

It takes longer than mouthwash. Doing it properly means swishing for 10 to 20 minutes, which most people do while showering or doing something else in the morning. Spitting it out (into the trash, not the sink, since oil can clog drains) is the end of it.

Coconut oil solidifies below about 76 degrees Fahrenheit, so if your bathroom is cold, you’ll be chewing it into liquid first. Sesame oil or sunflower oil avoid this and have similar research support.

The Bottom Line

Oil pulling does something. The evidence that it reduces oral bacteria and modestly improves breath is real, even if the studies aren’t definitive. It’s not better than chlorhexidine mouthwash and it’s not a substitute for brushing, flossing, and tongue scraping.

If you want to use it as part of your routine, that’s a reasonable choice. If you’re hoping it will fix a persistent bad breath problem on its own, it won’t. The source of your bad breath still needs to be addressed.

References

1. [1] Van den Broek AM, Feenstra L, de Baat C. A review of the current literature on management of halitosis. Oral Dis.2008. DOI: 10.1111/j.1601-0825.2007.01350.x
2. [2] Scully C, Greenman J. Halitosis (breath odor). Periodontol 2000.2008. DOI: 10.1111/j.1600-0757.2008.00266.x
3. [3] Tonzetich J. Production and origin of oral malodor: a review of mechanisms and methods of analysis. J Periodontol.1977. DOI: 10.1902/jop.1977.48.1.13