Is it okay to use baking soda on your teeth?

Yes, but with some important limits. Baking soda can safely remove surface stains from your teeth when used correctly, and it's been studied for decades as a dental ingredient. The key is understanding what it can realistically do, what it can't and how to avoid the one common mistake that can cause more harm than good.

What you'll learn in this article:

• Baking soda can safely remove surface stains, but it can't whiten stains beneath the enamel.

• Use baking soda no more than two to three times a week, as overuse can wear down enamel.

• Plain baking soda contains no fluoride, so it should never replace your regular fluoride toothpaste.

• A toothpaste with baking soda is a safer choice for daily use than brushing with baking soda powder alone.

If you're unsure whether baking soda is a good choice for your teeth, a dental provider can help you weigh the benefits, understand the risks and decide whether another option is a better fit.

What baking soda actually does to your teeth

Baking soda, also called sodium bicarbonate, is a fine, mildly abrasive powder. When you brush with it, the tiny particles gently scrub away surface stains caused by coffee, tea, red wine, tobacco and other dark-colored foods and drinks.¹

Baking soda also helps neutralize the acids that bacteria produce in your mouth. Because these acids contribute to tooth decay, that's an added benefit. Still, most people use baking soda for its ability to remove surface stains and make teeth look brighter.

What baking soda can and cannot do

Can it whiten surface stains?

Yes, and it does this reasonably well. Research published in the Journal of the American Dental Association found that baking soda-based toothpastes outperformed non-baking soda products for removing surface stains.¹ These are the yellowy or brownish discolorations that form on the outside of your teeth from what you eat and drink over time.

What about stains that go deeper?

This is where baking soda runs out of road. Some staining forms inside the tooth structure itself. This comes from certain antibiotics taken during childhood, excessive fluoride exposure, a previous tooth injury or simply the natural aging process. Baking soda can't reach these stains, no matter how often you use it. For this type of discoloration, professional whitening or veneers are the only real options.

Does it protect against cavities?

No, and this is something many people miss. Plain baking soda contains no fluoride, the mineral that strengthens enamel and guards against decay.² If you swap out your regular toothpaste entirely and brush only with baking soda, you lose that protection. Think of plain baking soda as a stain-fighting supplement to your routine, not a replacement for fluoride toothpaste.

How to use baking soda safely on your teeth

The method is simple: Mix a small amount of baking soda with enough water to form a thin paste, brush gently for about two minutes and rinse well. Use it no more than two to three times a week, as daily use increases the risk of enamel wear over time.²

A few things worth avoiding:

• Don't use baking soda on the same day you're using whitening strips: layering both at once can be too harsh on enamel

• Use a light touch; aggressive scrubbing undoes any benefit

• Rinse thoroughly, since leftover baking soda can temporarily shift the natural balance of acids in your mouth

Signs you may be using it too much

If your teeth become more sensitive to cold drinks or sweets, it could be an early sign that your enamel is wearing down. You may also notice your teeth looking more yellow. That happens because thinning enamel exposes more of the dentin underneath, which has a naturally yellow color. Soreness near the gumline after brushing is another sign to watch for.

If you notice any of these changes, stop using baking soda and have your dental provider check your enamel to make sure it isn't being damaged.

Toothpaste with baking soda vs. plain baking soda from the box

There's an important difference between the two. Toothpastes made with baking soda are specially formulated for daily use. They contain a controlled amount of baking soda, use finer particles that are gentler on enamel, and usually include fluoride to help protect against cavities.¹

If you want the benefits of baking soda, choose a toothpaste that contains it and has the ADA Seal of Acceptance. It's a safer, more balanced option than brushing with plain baking soda from the box.

When professional whitening makes more sense

If your teeth have deep stains, years of discoloration, or staining beneath the surface, baking soda isn't likely to make much difference. Professional whitening treatments, including in-office procedures and custom take-home trays, use bleaching agents that can reach stains baking soda can't.

It's also important to know that whitening only works on natural teeth. Crowns, veneers and dental bonding won't change color with whitening, so treatment may look uneven if you have restorations.

A professional dental cleaning is often a good place to start. Removing built-up plaque and tartar can make your teeth look noticeably brighter before you consider whitening. If you're unsure which option is right for your smile, an Aspen Dental provider can help you understand what type of staining you have and which treatment is most likely to give you the results you're looking for.

Is it okay to use baking soda on your teeth? FAQs

Is it safe to mix baking soda with hydrogen peroxide?

Some people mix baking soda with hydrogen peroxide to make a whitening paste at home. Used occasionally, a diluted mixture is generally considered safe, but the concentration matters. Hydrogen peroxide sold in stores is typically 3%, and you shouldn't use anything stronger on your teeth. Higher concentrations can irritate your gums and damage enamel over time.

Even with a 3% solution, this mixture shouldn't replace your regular fluoride toothpaste or professional whitening. If you're hoping for faster or more noticeable results, your dental provider can help you decide whether professional whitening is a better option for your smile.

Can baking soda help with canker sores?

Rinsing with a baking soda and water solution can temporarily ease the discomfort of a canker sore and create a less acidic environment in your mouth while it heals. Mix about a teaspoon of baking soda into a small glass of warm water and swish gently for 30 seconds. It won't speed up healing, but it can take the edge off. If a sore hasn't cleared up after two weeks, have it evaluated.

Can I use baking soda to clean my dentures or retainer?

Yes — baking soda is a gentle option for both. Dissolve a teaspoon in a cup of water and soak your appliance for 20 to 30 minutes or use a thin paste with a soft brush. Rinse well before putting the appliance back in. Avoid bleach-based cleaners or harsh detergents, which can damage the material over time.

Can baking soda help with a toothache?

Baking soda won't treat the underlying problem causing tooth discomfort, but its alkaline properties may provide mild, temporary relief by reducing acidity in the mouth. A gentle rinse with baking soda and warm water is safe to try while you arrange to be seen. Discomfort that doesn't resolve on its own should always be evaluated — it rarely goes away without treatment.

Why does my mouth taste like baking soda after brushing?

That's a normal result of the powder itself; baking soda has a naturally salty, slightly sharp taste that lingers if you don't rinse well. A thorough rinse with water right after brushing should clear it. If you notice a burning sensation rather than just a taste, you may have used more than needed or brushed too long.

Sources

¹American Dental Association. "Stain removal and whitening by baking soda dentifrice." Journal of the American Dental Association, 2017. https://jada.ada.org/article/S0002-8177(17)30811-5/fulltext

²American Dental Association. "Baking soda dentifrices and oral health." Journal of the American Dental Association, 2017. https://jada.ada.org/article/S0002-8177(17)30822-X/fulltext