How to Use Baking Soda for Gum Disease

Baking soda can meaningfully reduce gum inflammation and bleeding when used as part of your daily brushing or rinsing routine, and the clinical evidence behind it is surprisingly solid. Multiple randomized trials show that toothpastes with high concentrations of sodium bicarbonate outperform conventional fluoride toothpastes for gingivitis within weeks. But there is a clear line between what baking soda can handle at home and what requires professional treatment, and crossing that line matters.

What Baking Soda Actually Does in Your Mouth

The appeal of baking soda for gum health comes down to three things working together. First, it raises the pH in your mouth, shifting conditions from acidic toward alkaline. Oral bacteria, particularly the species tied to plaque and gum disease, thrive in acidic environments. A study measuring salivary pH after a sodium bicarbonate rinse found a significant increase in pH along with a decrease in bacterial colony counts, especially for streptococcal species associated with dental plaque.¹ That pH shift makes the mouth temporarily less hospitable to the bacteria that drive gum inflammation.

Second, baking soda physically disrupts the sticky biofilm that coats teeth and gumlines. Dental plaque is not just bacteria floating around; it is a structured community of microorganisms embedded in a matrix that clings to tooth surfaces. Baking soda particles dissolve quickly in water, and as they do, they break apart that biofilm more effectively than many other common toothpaste abrasives. A review of the literature on plaque removal concluded that baking soda dentifrices are particularly effective at biofilm disruption while also exhibiting specific antibacterial properties against oral microorganisms.²

Third, baking soda appears to lower levels of inflammatory markers in the mouth. A study in smokers found that using a baking soda mouthwash significantly reduced salivary levels of interleukin-1β, a key signaling molecule involved in gum inflammation. The drop was substantial, going from roughly 9.4 pg/µL at baseline to about 5.4 pg/µL at follow-up, and the change was statistically significant, while the control group showed no meaningful shift.³ Reducing that inflammatory signaling is exactly what you want when gum tissue is swollen or bleeding.

The Clinical Evidence on Bleeding and Gingivitis

The most convincing data for baking soda’s gum benefits comes from randomized controlled trials that tracked actual clinical outcomes like bleeding on probing and gingivitis scores over weeks to months. A 2025 trial randomized about 190 people to brush with either a sodium bicarbonate toothpaste or a conventional fluoride toothpaste for 12 weeks. The baking soda group showed significantly fewer bleeding sites at every checkpoint: three weeks, six weeks, and twelve weeks. Gingivitis severity scores also dropped significantly at every time point compared to the control group, and plaque scores, including in hard-to-reach interproximal areas between teeth, improved as well.⁴

Another randomized trial tested toothpastes containing either 62% or 67% sodium bicarbonate against a control paste with none. Both baking soda groups had significantly fewer bleeding sites at 12 weeks, with the higher-concentration paste performing slightly better. The bleeding index was also significantly lower in the 67% baking soda group at both the 6-week and 12-week marks.⁵ These are not marginal effects detected only with statistical tricks; participants had measurably less bleeding and less visible gum inflammation.

A broader review of the literature on baking soda dentifrices and periodontal health echoed these findings, concluding that baking soda-containing toothpastes have shown potential as aids for improving gingival health and maintaining biofilm control.⁶ So this is not a single study making a bold claim. The pattern holds across multiple trials and reviews.

Two Practical Ways to Use It

You have two main options for getting baking soda’s gum benefits: brushing with it or rinsing with it. The evidence is stronger for brushing, since that is what most clinical trials have tested, but rinses have their own supporting data.

Brushing With a Baking Soda Toothpaste

The simplest approach is to buy a commercial toothpaste that already contains a high percentage of sodium bicarbonate. The clinical trials that showed significant gum improvements used formulations with roughly 62% to 67% baking soda, which is far more than the token amounts in some mainstream brands. Look at the ingredient list and check whether sodium bicarbonate is listed near the top. Many of these toothpastes also contain fluoride, which handles cavity prevention while baking soda handles the gum side of things.

If you prefer a DIY approach, you can make a paste by mixing about a teaspoon of baking soda with enough water to form a slightly gritty slurry. Dip a soft-bristled toothbrush into it and brush for two minutes, focusing on the gumline where plaque accumulates. The taste is salty and not particularly pleasant, which has always been baking soda’s biggest drawback as a tooth-cleaning agent.⁷ Commercial formulations mask this with flavoring, which is one practical reason to go that route if the salty taste bothers you. If you do make your own paste, be aware that it contains no fluoride, so you may want to alternate with a fluoride toothpaste or use a fluoride rinse separately.

Rinsing With a Baking Soda Solution

A baking soda mouth rinse is easy to prepare: dissolve about half a teaspoon of baking soda in a cup of warm water, swish for 30 seconds to a minute, then spit. This raises the pH across all the soft tissue surfaces in your mouth, not just the areas your toothbrush reaches. The pH shift alone reduces the bacterial load, as the study on salivary pH and microflora demonstrated.¹ In a hospital setting, a sodium bicarbonate mouth rinse was compared head-to-head with chlorhexidine, a prescription-strength antimicrobial rinse. Among acute leukemia patients undergoing chemotherapy, only 25% of those using the baking soda rinse developed ulcerative oral mucositis compared with about 63% in the chlorhexidine group.⁸ That was a specialized population, but it illustrates how gentle and protective a simple baking soda rinse can be for inflamed oral tissue.

For gum disease specifically, a rinse works best as a supplement to brushing rather than a replacement. The mechanical action of the toothbrush against the biofilm is a big part of what drives the gum improvements seen in clinical trials. A rinse adds the pH and anti-inflammatory benefits on top of that.

Safety and the Abrasivity Question

One common worry is that baking soda might be too abrasive and wear down tooth enamel over time. The evidence consistently says the opposite. Baking soda is softer than both enamel and dentin, which gives it an inherently low abrasive profile compared to many other ingredients used in toothpastes.⁹ Its particles also dissolve quickly when wet, so they do not keep scratching the way harder particles would. Reviews have described it as safe for long-term use with virtually no side effects when used in toothpaste formulations or as a mouthwash ingredient.¹⁰

There is one important safety caveat, though. An older study that tested a more aggressive home-care regimen involving baking soda mixed with 3% hydrogen peroxide as a paste along with a concentrated salt-water rinse found that all treated subjects developed desquamative gingival lesions, which are areas where the gum tissue peels or becomes raw.¹¹ The issue was likely the combined salt concentration and the peroxide, not baking soda alone. But it is a useful reminder: more is not better. Sticking to a mild paste or a dilute rinse is the way to go. If you are combining baking soda with hydrogen peroxide, keep both concentrations low and do not use the mixture daily without consulting a dentist.

Where Baking Soda Falls Short

Gum disease exists on a spectrum. Gingivitis, the milder form, involves red, swollen, and bleeding gums but no permanent damage to the bone or connective tissue holding your teeth in place. Periodontitis is the advanced form where that bone and tissue are actively being destroyed, pockets form between teeth and gums, and teeth can eventually loosen. Baking soda has a real track record against gingivitis. Its record against periodontitis is much weaker.

A study comparing Keyes’ method, a home hygiene approach based on baking soda paste and peroxide, to conventional oral hygiene in periodontitis patients found that oral hygiene alone had only minimal effects on the subgingival microflora, which are the bacteria living below the gumline in periodontal pockets. The primary antimicrobial effect came from professional scaling and root planing. When scaling was not performed, Keyes’ method was somewhat better than conventional hygiene, but neither approach came close to what professional treatment achieved.¹²

This makes biological sense. Baking soda, whether used as a paste or rinse, primarily works above the gumline and at the shallow margin where gum meets tooth. Once bacteria have colonized deep pockets below the gumline, a toothbrush or rinse simply cannot reach them. The biofilm in those pockets needs to be physically broken up by a dental professional with instruments designed to go subgingival. If you have been diagnosed with periodontitis, or if your gums are receding or your teeth feel loose, baking soda is not a substitute for professional care. It can serve as a helpful addition to your home routine after treatment, but it should not be your primary strategy.

Does Baking Soda Interfere With Fluoride?

This comes up frequently because many people already use fluoride toothpaste and wonder whether adding baking soda would somehow cancel out the cavity-protection benefits. An in-situ study measured enamel demineralization and remineralization in people using toothpaste with fluoride alone versus fluoride combined with baking soda. The result was clear: baking soda neither improved nor impaired fluoride’s protective effect on enamel.¹³ The two ingredients are compatible. A toothpaste that contains both gives you fluoride for cavity prevention and baking soda for gum health without one undermining the other. If you prefer making your own baking soda paste, just make sure you are still getting fluoride from another source in your routine.

The Bad Breath Connection

Gum disease and bad breath are closely linked because the same bacterial populations that inflame gums also produce volatile sulfur compounds, the molecules responsible for that characteristic rotten-egg mouth odor. Baking soda addresses this from multiple angles. By disrupting the biofilm where these bacteria live and by raising the pH to a less favorable range for their growth, it reduces the production of sulfur compounds at their source.

Controlled crossover studies found that toothpastes with high baking soda concentrations significantly reduced oral malodor as measured by both trained human judges and gas chromatography.¹⁴ A separate study measured volatile sulfur compounds after brushing with baking soda dentifrices and found that formulations with 20% or more baking soda significantly reduced sulfur compound levels for up to three hours after use.¹⁵ If persistent bad breath is one of your concerns alongside gum inflammation, baking soda tackles both issues through overlapping mechanisms.

Supragingival Cleaning and Its Subgingival Ripple Effect

One intriguing finding that bridges the gap between what baking soda can reach and what happens below the gumline comes from research on supragingival air polishing, a procedure that cleans the tooth surfaces above the gum using a pressurized stream of sodium bicarbonate powder. Even though the cleaning was performed only above the gumline, a study found significant decreases in subgingival bacterial counts afterward. Total viable counts of periodontal pathogens below the gumline dropped by about 85%, and the proportions of red and orange complex bacteria, the species most strongly associated with periodontitis, fell by roughly 82%.¹⁶

This suggests that thoroughly disrupting plaque above the gumline has downstream effects on the bacterial communities in shallow pockets below it. While professional air polishing is more intense than what you can achieve at home with a toothbrush and baking soda, the principle is encouraging: cleaning what you can reach may indirectly improve what you cannot. It also reinforces why consistent daily use matters more than occasional aggressive scrubbing. Keeping the supragingival environment clean and alkaline day after day starves the subgingival ecosystem of the reinforcements that allow pathogenic bacteria to recolonize.

Who Should Be Cautious

Baking soda is broadly safe for most people, but a few groups should think twice or adjust their approach. If you are on a sodium-restricted diet for blood pressure or kidney disease, the sodium content of baking soda is worth considering, especially with rinses where some amount is inevitably swallowed. The study that tested a baking soda and salt rinse regimen did find that urinary sodium did not increase in treated subjects, which is reassuring for typical use.¹¹ Still, if your doctor has been strict about sodium intake, it is worth mentioning your oral care routine at your next appointment.

People with exposed root surfaces from gum recession should be a little more cautious about abrasion. While baking soda is softer than enamel, root surfaces are covered by cementum, which is softer still. Gentle brushing with a soft-bristled brush is especially important in these cases. And if you have deep periodontal pockets, open sores, or are recovering from oral surgery, run any new rinse past your periodontist before adding it to your routine.

Children under six should generally stick with age-appropriate fluoride toothpaste. The salty taste of baking soda makes accidental swallowing less likely since most kids will spit it out instinctively, but the fluoride dosing in children’s toothpaste is carefully calibrated for developing teeth, and baking soda does not replace that.

Getting the Taste Right

The biggest barrier to long-term use is not safety or cost. It is that baking soda tastes terrible to most people. The salty, slightly mineral flavor is a consistent complaint in studies, and it has been noted as a disadvantage since the early days of baking soda’s use in oral care.⁷ Commercial baking soda toothpastes have improved dramatically on this front with mint flavoring and other palatability tweaks. If you have tried a DIY paste and hated the experience, a store-bought formulation with a high baking soda percentage may be a better fit for daily use. Compliance over months is what drives the clinical results. A paste you use every day beats a theoretically superior one you abandon after a week.

For rinses, adding a drop of peppermint oil to the baking soda and water mix can make the experience more tolerable without interfering with the chemistry. Some people also find that using the rinse at a different time of day than their regular brushing helps, since it spreads out the salty moments and keeps the routine from feeling like a chore.