The best toothpaste for cavities is one that contains fluoride. Fluoride is the only toothpaste ingredient with decades of strong trial evidence for preventing tooth decay. For most people, any fluoride toothpaste with the ADA Seal works well. People at higher risk of cavities may benefit from a stronger, prescription-strength fluoride paste from their dentist.
Quick verdict
- Best overall: a fluoride toothpaste with the ADA Seal of Acceptance. To earn the Seal with a cavity-prevention claim, the ADA requires fluoride and proof of safety and effectiveness.
- Best budget: a store-brand fluoride toothpaste. These usually cost a few dollars and contain the same active ingredients as name brands. Check the Drug Facts label for fluoride.
- Best for sensitive teeth and cavities: a stannous fluoride toothpaste. Stannous fluoride fights decay and can also reduce sensitivity.
- Best for high cavity risk: a prescription 1.1% sodium fluoride (5,000 ppm) toothpaste, if your dentist recommends it.
- Who should skip fluoride-free pastes: anyone with frequent cavities, dry mouth, exposed roots or braces, unless their dentist advises otherwise.
Toothpaste types for cavities compared
| Type | Active ingredient | Typical US price | Evidence against cavities | Best for |
|---|---|---|---|---|
| Standard fluoride toothpaste | Sodium fluoride or sodium monofluorophosphate (about 1,000 to 1,100 ppm) | About $3 to $8 a tube | Strong | Most adults and kids |
| Stannous fluoride toothpaste | Stannous fluoride | About $5 to $10 a tube | Strong (it is a fluoride) | Cavities plus sensitivity |
| Prescription-strength fluoride | 1.1% sodium fluoride (5,000 ppm) | Often $10 to $30 a tube; depends on brand vs generic and insurance | Strong for higher-risk patients | Frequent cavities, root decay, dry mouth |
| Hydroxyapatite toothpaste | Hydroxyapatite (often nano-sized) | Often $8 to $20 a tube | Moderate and growing, fewer trials | People who prefer to avoid fluoride |
| Fluoride-free “natural” toothpaste | None for cavities | About $4 to $10 a tube | None | Not a cavity-prevention choice |
Prices are typical US retail ranges and vary by brand, size, store and insurance.
What makes a toothpaste good for cavities?
Cavities start when bacteria in plaque turn sugar into acid. That acid pulls minerals out of enamel. Fluoride helps enamel take minerals back and makes it more resistant to the next acid attack. It is why very early decay, seen as a chalky white spot, can sometimes stop or reverse. Our guide to what a cavity looks like shows how decay changes at each stage.
The American Dental Association lists three fluoride compounds used in toothpaste to prevent cavities: sodium fluoride, stannous fluoride and sodium monofluorophosphate. Any of the three counts. Look for one under “Active ingredient” on the Drug Facts panel.
Does fluoride strength matter?
Somewhat. A 2019 Cochrane review of fluoride toothpaste strengths (measured in parts per million, or ppm) found:
- Toothpastes with 1,000 ppm fluoride or more prevented decay compared with non-fluoride paste.
- In adults, 1,000 to 1,100 ppm toothpaste reduced decay compared with non-fluoride paste.
- In children and teens, 1,450 to 1,500 ppm prevented slightly more decay than 1,000 to 1,250 ppm (moderate-certainty evidence).
- Going above 1,500 ppm in over-the-counter strengths didn’t add a clear benefit in children and teens.
Most US toothpastes sit around 1,000 to 1,100 ppm. That level works. The bigger difference comes from brushing twice a day, every day.
For young children, the strength question is balanced against fluorosis, which is faint white marks on developing teeth from swallowing too much fluoride. The ADA advises a smear the size of a grain of rice from the first tooth to age 3, and a pea-sized amount from 3 to 6, with an adult supervising so the child spits rather than swallows.
Stannous fluoride vs sodium fluoride
Both prevent cavities. Stannous fluoride has an extra use: the ADA notes a 2023 review found twice-daily stannous products can reduce sensitivity pain.
There isn’t clear evidence that one beats the other for cavities alone. Pick stannous fluoride if you also have sensitive teeth, and sodium fluoride if you prefer the taste or feel.
Prescription-strength fluoride toothpaste
Dentists can prescribe toothpaste with 5,000 ppm fluoride (1.1% sodium fluoride), about five times the usual strength. The ADA’s clinical guidance includes prescription-strength home fluorides for patients at elevated risk of decay, and lists 5,000 ppm toothpaste or gel among options for managing early, non-cavitated lesions.
People who are often offered it include those with:
- New cavities at most checkups
- Exposed roots from gum recession
- Dry mouth from medicines, radiation or other conditions (see dry mouth)
- Braces, or many crowns and fillings
It is used in place of regular toothpaste, as directed. It is not meant for young children and shouldn’t be shared with family members.
Is hydroxyapatite toothpaste as good as fluoride?
Hydroxyapatite is a calcium phosphate mineral, the same mineral that makes up most of enamel. A 2024 meta-analysis in the Journal of Dentistry concluded that hydroxyapatite toothpastes reduce cavities without fluoride, based on 5 clinical trials and 8 in-mouth (in situ) studies. A 2022 review was more cautious and called for larger, longer studies.
The fair summary: it is a reasonable option for people who want to avoid fluoride, but its evidence base is far smaller than fluoride’s. Because the ADA requires fluoride for a cavity-prevention Seal, hydroxyapatite toothpastes don’t carry that claim. If you have frequent cavities, ask your dentist before switching.
Ingredients that don’t prevent cavities
- Charcoal. There’s no evidence it prevents cavities, and many charcoal pastes contain no fluoride.
- Whitening agents. Whitening pastes remove stains; any cavity protection comes from the fluoride they may also contain.
- “Natural” pastes without fluoride. Herbs and essential oils may freshen breath but don’t replace fluoride.
How to get the most from your toothpaste
- Brush twice a day for two minutes, including along the gumline. See how to brush your teeth.
- Use about a pea-sized amount.
- Clean between teeth once a day, since toothpaste doesn’t reach there well.
- Cut down on how often you have sugary snacks and drinks. Frequent snacking keeps teeth under acid attack.
When to see a dentist
See a dentist if a tooth is sensitive to sweets, hot or cold, if you see a dark spot or hole, if food keeps catching in one spot, or if you have pain when biting. These can be signs of decay that toothpaste can’t fix. Our guide on how to know if you have a cavity explains the early signs. If you get new cavities often, ask your dentist about your risk and whether prescription fluoride, sealants or in-office fluoride make sense.
Frequently asked questions
What is the best toothpaste for cavities?
A fluoride toothpaste with the ADA Seal of Acceptance. Fluoride has the strongest evidence for preventing decay, and the Seal means the ADA reviewed data on safety and effectiveness. Store brands and name brands with the same fluoride level work similarly. People at higher risk may be prescribed a 5,000 ppm fluoride toothpaste by their dentist.
Can toothpaste reverse a cavity?
Not once there is a hole. Very early decay, seen as a chalky white spot on enamel, can sometimes be stopped or reversed as fluoride and saliva help enamel take back minerals. Once the surface breaks down into a cavity, it needs a filling or other treatment from a dentist.
Is stannous fluoride better than sodium fluoride for cavities?
Both prevent cavities, and there isn’t clear evidence that one is better for decay alone. Stannous fluoride can also reduce tooth sensitivity, so it can be a good pick for people with sensitive teeth.
Is hydroxyapatite toothpaste better than fluoride?
Not proven. A 2024 meta-analysis found hydroxyapatite toothpaste reduces cavities, but it is based on far fewer studies than fluoride. It is a reasonable option for people who want to avoid fluoride. People with frequent cavities should talk to their dentist before switching.
Do I need a prescription toothpaste?
Most people don’t. Prescription toothpaste with 5,000 ppm fluoride is usually reserved for people at elevated risk, such as those with frequent new cavities, exposed roots, dry mouth or braces. Your dentist can assess your risk and tell you whether it makes sense.
