You can brush your teeth with coconut oil, and many people do, but the practice is better understood as a supplement to standard oral hygiene than a replacement for it. Most of the clinical research on coconut oil in the mouth involves oil pulling, where you swish a tablespoon of oil for ten to twenty minutes, rather than scrubbing it onto teeth with a bristled brush. The evidence for either approach is genuinely interesting but comes with real limitations that matter before you ditch your regular toothpaste.
Oil Pulling Versus Brushing With Coconut Oil
When most people ask about brushing with coconut oil, they’re picturing one of two things: scooping a bit onto a toothbrush and scrubbing, or swishing liquid oil around the mouth in the traditional practice known as oil pulling. These are different activities with different levels of evidence behind them. Oil pulling is an ancient practice rooted in Ayurvedic medicine and has been the subject of clinical trials over the past two decades.1PubMed Central. Oil pulling and importance of traditional medicine in oral health maintenance Brushing with coconut oil as a paste, by contrast, has almost no dedicated research. The mechanical scrubbing you do with a toothbrush matters regardless of what’s on it, and the oil itself adds some antimicrobial properties, but the vast majority of findings people cite when recommending coconut oil for teeth come from oil-pulling trials.
If you do want to brush with it, the practical reality is straightforward. Coconut oil is solid below about 76°F and melts quickly in your mouth. You can put a pea-sized amount on your brush. It won’t foam, it won’t taste minty, and it contains no fluoride, which is worth keeping in mind. There’s nothing inherently dangerous about it, but what you’re getting is mostly the antimicrobial action of the oil’s fatty acids plus whatever benefit the physical brushing provides.
What Clinical Trials Show About Plaque and Gum Health
The most consistent finding across oil-pulling studies is a reduction in dental plaque and improvements in gum inflammation scores. A randomized crossover trial found that coconut oil pulling inhibited plaque regrowth at a level comparable to chlorhexidine, a prescription-strength antimicrobial mouthwash considered the gold standard, and it caused less tooth staining.2Complementary Therapies in Medicine. Efficacy of oil pulling therapy with coconut oil on four-day supragingival plaque growth: A randomized crossover clinical trial The gingival index and bleeding on probing were also similar between the two groups in that study.
That said, not every trial paints such a rosy picture. One study that directly compared coconut oil pulling to chlorhexidine rinse over thirty days found that plaque scores and colony-forming units of bacteria remained higher in the coconut oil group at every time point measured.3Journal of Datta Meghe Institute of Medical Sciences University. Comparative efficacy of coconut oil-pulling therapy versus 0.2% chlorhexidine mouthrinse on dental plaque and gingival health: A clinicomicrobiological study So the picture is mixed. The direction of the effect seems positive, meaning coconut oil does appear to reduce plaque compared to doing nothing, but whether it matches a dedicated antimicrobial rinse depends on the trial design and the population studied.
A meta-analysis pooling data from multiple oil-pulling studies concluded that the practice reduces total oral bacterial counts and lowers plaque and gingival scores, though it did not find a significant drop in one particular cavity-causing bacterium, Streptococcus mutans, in saliva.4PubMed Central. Effectiveness of Oil Pulling for Improving Oral Health: A Meta-Analysis That distinction matters: reducing overall bacterial load in the mouth is helpful, but Streptococcus mutans is the organism most directly linked to tooth decay. If oil pulling doesn’t reliably knock it down, that limits the case for coconut oil as cavity protection.
How Coconut Oil Affects Oral Bacteria
Coconut oil is roughly half lauric acid, a medium-chain fatty acid with well-documented antimicrobial properties. When saliva and digestive enzymes partially break down the oil in your mouth, they produce monolaurin, a compound that disrupts bacterial cell membranes. This is the proposed mechanism behind most of the antibacterial effects researchers observe.
A triple-blind clinical trial found that coconut oil treatment shifted the composition of bacteria beneath the gumline in a beneficial direction. Pathogenic families associated with gum disease were reduced, while beneficial bacteria increased. The same study measured inflammatory markers in gum tissue and found reductions in two key ones, suggesting the oil had a genuine anti-inflammatory effect beyond just killing bacteria.5PubMed Central. Anti-inflammatory and antimicrobial efficacy of coconut oil for periodontal pathogens: a triple-blind randomized clinical trial This is one of the stronger pieces of evidence for coconut oil, because it went beyond simple plaque measurements and looked at the actual microbial community changes in the gum pockets where periodontal disease develops.
When it comes to biofilms, the structured bacterial communities that cling to tooth surfaces and resist removal, the picture is more nuanced. Lab research found that coconut oil could reduce Candida albicans biofilm by about 65%, which is substantial, but its effect on common oral bacterial biofilms like Streptococcus species was more modest, around 28%.6PubMed Central. The antibiofilm activity of selected substances used in oral health prophylaxis Another lab study testing different types of coconut oil against Streptococcus mutans biofilm found that only refined coconut oil at higher concentrations achieved a statistically significant reduction; virgin and extra virgin varieties showed a trend toward less biofilm but didn’t reach significance.7PubMed Central. The Effect of Coconut and Frankincense Oils on the Biofilm Growth of Streptococcus mutans
A randomized trial that tracked actual bacterial counts in the mouth after 28 days of virgin coconut oil pulling found no significant change from baseline in total, aerobic, or anaerobic bacteria.8PubMed Central. Microbiological Effects of Virgin Coconut Oil Pulling in Comparison with Palm Oil Pulling as an Adjunctive Oral Hygiene Care for Patients with Gingival Inflammation: A Randomized Controlled Clinical Trial The same trial found no significant difference between coconut oil and palm oil pulling on any microbiological measure. This is a useful reality check: the effect of oil pulling on bacterial counts may be more subtle than you’d expect, and the type of oil may matter less than proponents claim.
Does Coconut Oil Whiten Teeth?
This is one of the most popular claims online, and the evidence is thin. One in vitro study, meaning it was done on extracted teeth in a lab rather than in anyone’s mouth, found that a natural tooth stored in coconut oil showed some improvement in shade and appeared glossier.9Journal of Advanced Dental Research. Effects of Coconut and Olive Oil on Tooth and Restoration – in vitro Study- Myth(oil)ogy? That’s a single observation under artificial conditions, and it’s a long way from evidence that swishing coconut oil will brighten your smile.
What probably happens is indirect. If oil pulling removes some surface plaque and staining, teeth can look slightly whiter because the film coating them is gone, not because the enamel itself has changed color. Anyone who has had a professional dental cleaning and noticed their teeth look brighter afterward has experienced the same phenomenon. Coconut oil does not contain peroxide or any bleaching agent, so it cannot lighten intrinsic tooth color the way whitening strips or professional treatments do. If your teeth are stained from coffee or tea and you start oil pulling, you might notice a modest cosmetic improvement. If your teeth are naturally yellowish, coconut oil won’t change that.
Coconut Oil and Bad Breath
Because halitosis is usually driven by bacteria on the tongue and around the gums, any intervention that reduces oral bacterial load should help with breath. A study of orthodontic patients wearing braces, a group especially prone to food trapping and bacterial buildup, found that oil pulling led to measurable improvements in breath scores alongside other oral hygiene measures.10PubMed. Halitosis Reduction and Oral Hygiene Improvement: A Study of Chlorhexidine, Oil Pulling, and Saline in Orthodontic Patients with Braces Chlorhexidine also worked in that trial, and even saline rinsing showed some effect, so the takeaway is that oil pulling can help with breath, though it’s not uniquely powerful in that department. For persistent bad breath, the cause usually goes deeper than surface bacteria, think tongue coating, gum disease, or digestive issues, and oil alone won’t address those root problems.
Is Coconut Oil Better Than Other Oils?
Oil pulling can technically be done with any edible oil. Sesame oil is the most traditional choice in Ayurvedic practice. So does the type of oil actually matter? A triple-blind trial comparing coconut, sesame, and sunflower oil pulling found that all three improved gingival health, but coconut oil was the most effective of the three.11PubMed Central. Comparison and Evaluation of the Efficacy of Sesame Oil, Coconut Oil, and Sunflower Oil Pulling on Gingival Health-A Triple-Blind Randomized Clinical Trial Coconut oil’s high lauric acid content is the likely reason for the edge: lauric acid has stronger antimicrobial properties than the fatty acids predominant in sesame or sunflower oil.
There’s also a practical advantage. Many people find coconut oil more palatable to hold in the mouth for ten to twenty minutes. It has a mild taste and a pleasant texture once melted. Sesame oil has a stronger flavor that some people find unpleasant during a long swish. If you’re going to commit to oil pulling, palatability matters because the practice only works if you actually do it consistently.
Coconut Oil Against Oral Fungal Infections
One area where coconut oil shows genuine promise is against Candida albicans, the yeast responsible for oral thrush. Lab studies have demonstrated that coconut oil disrupts Candida biofilm at relatively high rates compared to its effect on bacterial biofilms. Research on the antifungal mechanism suggests that certain processed forms of coconut oil can damage the cell membrane of Candida, causing the contents to leak out.12PubMed Central. The influence of Azadirachta indica, Melaleuca alternifolia, and Cocos nucifera on Candida albicans strain in tissue conditioner at varying time intervals One study tested coconut oil incorporated into the material used in dental tissue conditioners (soft liners placed inside dentures) and found it inhibited Candida growth, suggesting a potential application for denture wearers prone to fungal infections under their prostheses.
This doesn’t mean swishing coconut oil will cure a case of oral thrush. Clinical fungal infections typically need antifungal medication. But for someone who is prone to mild Candida overgrowth, adding coconut oil to an oral hygiene routine could, in theory, help keep yeast populations in check. The evidence here is mostly from lab studies, and clinical trials specifically designed to test coconut oil as a thrush treatment are scarce.
Safety Concerns You Should Know About
Coconut oil is a food product, so the safety profile is reassuring for most people. You can swallow small amounts without worry. The primary risk is less about the oil itself and more about the technique: oil pulling involves holding a relatively large volume of liquid in your mouth and vigorously swishing, which creates an aspiration hazard. Two case reports documented exogenous lipoid pneumonia, a rare lung condition caused by inhaling oily substances, in patients who had been regularly performing oil pulling for several months.13PubMed Central. Exogenous lipoid pneumonia caused by repeated sesame oil pulling: a report of two cases Those cases involved sesame oil rather than coconut oil, and the risk applies to oil pulling generally rather than to any specific oil. The danger is highest for older adults, people with swallowing difficulties, or anyone who tends to breathe through their mouth during the swishing process.
If you’re just brushing with a small dab of coconut oil on your toothbrush, the aspiration risk is essentially nonexistent because the volume is tiny and you aren’t swishing. The main safety issue with brushing this way is what’s missing: fluoride. Fluoride is the single most evidence-supported ingredient for preventing cavities. Coconut oil contains none, and no study has shown it can replace fluoride’s protective effect on enamel. If you use coconut oil as your sole toothpaste, you’re removing the one ingredient with decades of cavity-prevention data behind it.
What Coconut Oil Cannot Do
The enthusiasm around coconut oil sometimes outpaces the evidence, and it’s worth being clear about the boundaries. Coconut oil has not been shown to remineralize enamel. It has not been proven to reverse cavities. It does not contain abrasives that can mechanically scrub away staining the way toothpaste does, nor does it contain fluoride to strengthen the mineral structure of your teeth. The clinical trials that show benefits are largely measuring plaque reduction and gum inflammation, both of which are meaningful for gum health but are not the same as cavity prevention.
There’s also no evidence that coconut oil can treat established periodontal disease. The trials showing improvements in gingival health are conducted on people with gingivitis, the milder and reversible form of gum disease. If you have deep pockets, bone loss, or advanced periodontitis, oil pulling is not a treatment. You need professional intervention.
The research overall is still at an early stage. Most studies have small sample sizes, short follow-up periods, and are concentrated in a handful of countries. The meta-analyses that exist are working with limited data. This doesn’t mean the findings are wrong, but it does mean you should treat coconut oil as a potential adjunct to a good oral hygiene routine, not as a standalone solution. Brushing with fluoride toothpaste, flossing, and seeing a dentist regularly remain the evidence-backed foundation. Coconut oil pulling or brushing can sit on top of that foundation if you enjoy it and find it helpful.
How to Actually Do It
If you want to try coconut oil in your oral care routine, the most studied approach is oil pulling. Put about a tablespoon of coconut oil in your mouth, let it melt, and swish it gently through your teeth for fifteen to twenty minutes. Don’t gargle. Don’t tilt your head back. Spit it into a trash can rather than the sink, because coconut oil solidifies at cool temperatures and can clog pipes over time. Then brush your teeth with regular toothpaste as you normally would.
If you prefer brushing with it, use a small amount on a soft-bristled brush and brush normally. Follow up with fluoride toothpaste or a fluoride rinse to get the cavity protection that coconut oil can’t provide. Some people also mix coconut oil with baking soda to create a DIY paste that adds mild abrasiveness, though there’s no clinical research specifically on that combination.
Morning is the most popular time for oil pulling, typically done before eating breakfast. The practice does demand patience: twenty minutes of swishing is a long time, and many people start at five minutes and work up. If you find yourself gagging or feeling uncomfortable, use less oil. A teaspoon is easier to manage than a full tablespoon, and there’s no clinical evidence establishing a minimum effective volume.
Coconut Oil and Dental Restorations
One question that rarely comes up in popular discussions but matters for many people is whether coconut oil affects fillings, crowns, or bonded restorations. A study examined how coconut oil pulling influenced the shear bond strength of adhesive materials bonded to enamel.14HRU International Journal of Dentistry and Oral Research. Evaluating the Influence of Coconut Oil Pulling and Adhesive Application Modes on Shear Bond Strength to Enamel While the specific results from that study are not fully reported in the abstract, the fact that researchers are investigating this question suggests it’s on the radar. The in vitro tooth study mentioned earlier noted that coconut oil appeared to leave teeth glossier, but that same study also tested composite restorations and found different effects depending on the material.
If you have extensive dental work, particularly older composite fillings or temporary restorations, it’s reasonable to mention oil pulling to your dentist. There’s no strong evidence that it damages restorations, but there’s also no long-term data confirming it’s completely inert toward bonded materials. Porcelain crowns and metal fillings are almost certainly unaffected, as these materials are chemically stable against food-grade oils. The concern, if any exists, would be with resin-based materials that could theoretically absorb lipids over time, though this remains speculative without robust clinical data.