The short answer: Does natural toothpaste prevent cavities? Only if it contains an ingredient shown to prevent decay, which in practice means fluoride, with hydroxyapatite as a less-tested alternative. Words like “natural,” “herbal” and “organic” say nothing about cavity protection (Baysan, 2026). Herbal, baking soda and charcoal toothpastes have mostly been studied for plaque, gums or whitening rather than cavities, and a 2026 review of 122 studies found no fluoride-free toothpaste with evidence comparable to fluoride for long-term cavity prevention in children (Wong & Donnell, 2026). Some natural-brand toothpastes do contain fluoride (Baysan, 2026); in the US, look for “anticavity” or “fluoride” on the label (U.S. Food and Drug Administration, 2026).
Natural toothpaste has moved from health-food stores to every drugstore shelf. In a 2021 survey of 500 toothpastes, tooth powders and toothpaste tablets sold in the UK, 31% contained no fluoride and another 4% did not say whether they did (Gupta et al., 2021). In November 2026, a professor of cariology (the study of tooth decay) wrote in The Conversation that the words on the front of a tube can’t tell you whether it protects your teeth (Baysan, 2026).
So if you like the idea of plant-based ingredients, the useful question isn’t “natural or not?” but “what in this tube has been shown to prevent decay?” This article covers whether natural and fluoride-free toothpastes prevent cavities, what studies show for each common natural ingredient, how to tell from the label whether a natural toothpaste has fluoride, and when to see a dentist.
Does natural toothpaste prevent cavities?
A natural toothpaste with fluoride protects against cavities the way any fluoride toothpaste does; without fluoride, the evidence is much thinner. “Natural” has no set meaning for toothpaste. In the US, the only ingredients a toothpaste can be sold with as cavity-preventing (“anticaries”) under the Food and Drug Administration’s (FDA) over-the-counter rules are three forms of fluoride: sodium fluoride, sodium monofluorophosphate and stannous fluoride (U.S. Food and Drug Administration, 2026).
The evidence behind fluoride toothpaste is large:
- A 2003 Cochrane review that pooled 70 trials in 42,300 children found that fluoride toothpaste prevented about 24% of new decayed, missing or filled tooth surfaces compared with non-fluoride toothpaste (Marinho et al., 2003).
- A 2019 Cochrane review of 96 trials found high-certainty evidence that standard-strength fluoride toothpaste (1,000 to 1,250 ppm) reduces new decay in the adult teeth of children and teens compared with non-fluoride toothpaste (Walsh et al., 2019).
- In adults, the same review found 3 trials with 2,162 people: those using 1,000 or 1,100 ppm fluoride toothpaste developed fewer new decayed, missing or filled tooth surfaces than those using a non-fluoride paste, about half a surface fewer per person on average (moderate-certainty evidence) (Walsh et al., 2019).
“ppm” means parts per million, the amount of fluoride in the paste. For how fluoride strengthens enamel, see how fluoride protects your teeth.
Does fluoride-free toothpaste cause cavities?
No toothpaste causes cavities by itself. Decay (dental caries) starts when plaque bacteria turn sugars into acid that dissolves enamel. Fluoride-free toothpaste still helps you brush plaque away, but it gives up the extra protection fluoride adds, so your brushing and diet have to do all the work.
A 2026 scoping review mapped 122 studies of fluoride-free toothpastes published from 2020 to 2026. Most were laboratory or mechanism studies. Only 20 gave direct evidence in children, and few measured actual cavities rather than indirect signs (surrogate outcomes) such as bacteria counts or mineral changes in enamel. Hydroxyapatite had the most consistent evidence among fluoride-free options, but no fluoride-free type matched fluoride for long-term cavity prevention in children (Wong & Donnell, 2026).
One case can’t prove cause and effect, but it shows why the question matters. A 2019 letter in the British Dental Journal described a 20-year-old dental student who had switched to an organic fluoride-free toothpaste three years earlier and was found to have decay reaching the inner layer of four teeth. She also had a history of high sugar intake with regular sugary snacks, and had not seen a dentist in three years, so the toothpaste was only one possible factor (Malik & Baysan, 2019).
Which natural toothpaste ingredients have evidence?
Most natural ingredients have been tested for plaque and gum inflammation (gingivitis), not for cavities. This table sums up what the reviews in the sections below found.
| Ingredient | Usually sold for | Evidence on cavities | Evidence on plaque or gums |
|---|---|---|---|
| Fluoride (in natural-brand pastes) | Preventing cavities | Strong: many long-term trials | Not its main purpose |
| Hydroxyapatite | Enamel repair, preventing cavities | A few trials, mostly short; several linked to the manufacturer | Not the focus of the trials |
| Herbal extracts (neem, aloe vera, green tea and others) | Gum health | No good cavity trials found | Short-term plaque reduction similar to regular toothpaste, in low-quality trials |
| Baking soda | Cleaning, whitening | Not measured in the reviews found | More plaque removed in single-brushing tests; slightly less gum bleeding |
| Xylitol | Preventing cavities | Low-quality evidence: 13% fewer cavities when added to fluoride toothpaste | Not the focus of the trials |
| Activated charcoal | Whitening | Not enough data; some studies reported harm | More abrasive than other pastes in lab studies |
Sources: Brooks et al., 2017; Chatzidimitriou et al., 2025; Janakiram et al., 2020; Marinho et al., 2003; Paszynska et al., 2023; Riley et al., 2015; Saikia et al., 2024; Taschieri et al., 2022; Tomás et al., 2023; Valkenburg et al., 2019; Walsh et al., 2019; Wong & Donnell, 2026.
Does herbal toothpaste work?
Herbal toothpaste may reduce plaque in the short term about as well as regular toothpaste, but there’s no good evidence that it prevents cavities.
- A 2020 meta-analysis of 24 randomized trials in 1,597 adults (15 of them testing herbal toothpaste, with 899 people) concluded that herbal toothpaste is about as effective as conventional toothpaste for short-term plaque reduction, but the trials were low quality (Janakiram et al., 2020).
- An earlier meta-analysis of 10 trials favored conventional toothpaste for plaque and gum inflammation overall, found no difference in the short- and long-term subgroups, and concluded that there was no high-quality evidence for or against herbal toothpaste (Mehta et al., 2018).
- A 2024 overview of systematic reviews found that some herbal products, especially mouthwashes, reduced plaque and gingivitis about as well as standard products, but most trials lasted under 4 weeks and there were signs of publication bias (Mehta et al., 2024).
- A 2024 review of herbal toothpaste for preventing cavities in children and teens found only 7 eligible studies. The only result that could be pooled was bacteria counts, with no clear difference from non-herbal toothpaste (Saikia et al., 2024).
Less plaque and calmer gums are worth having, but they don’t prove that a toothpaste prevents decay (Baysan, 2026). Some herbal toothpastes also contain fluoride, so you don’t always have to choose. If your gums bleed when you brush, read gum disease and bleeding gums.
Is baking soda or charcoal toothpaste good for your teeth?
Baking soda toothpaste has fair evidence for plaque and gums; charcoal toothpaste has little evidence for any benefit and may be too abrasive.
Baking soda (sodium bicarbonate). A 2019 systematic review of 21 publications found that baking soda toothpaste removed more plaque than comparison pastes in single-brushing tests. In longer studies, the plaque benefit held up only against pastes with no active ingredient, and gum bleeding dropped slightly (Valkenburg et al., 2019). A 2022 meta-analysis of 7 trials of a toothpaste containing 67% baking soda found better gum inflammation, bleeding and plaque scores in people with gingivitis (Taschieri et al., 2022). Neither review looked at cavities. Baking soda and fluoride can go together: the FDA’s rules include fluoride tooth powders made with baking soda (U.S. Food and Drug Administration, 2026).
Activated charcoal. A 2017 review in the Journal of the American Dental Association found too little clinical and laboratory data to back the safety and benefit claims of charcoal toothpastes. Among 13 studies of brushing with raw charcoal or soot, three reported harms such as more decay or enamel wear (Brooks et al., 2017). A 2023 review of 11 lab studies found that charcoal pastes whitened less than other options and were generally more abrasive (Tomás et al., 2023). Lab tests can’t show how much wear happens in a real mouth. More in is charcoal toothpaste safe?
Does xylitol or hydroxyapatite toothpaste prevent cavities?
These two have the most cavity research among ingredients sold as natural, but both come with caveats.
Xylitol, a sugar alcohol used as a sweetener. A 2015 Cochrane review found low-quality evidence that fluoride toothpaste with 10% xylitol reduced cavities by 13% over 2.5 to 3 years compared with fluoride-only toothpaste, in 4,216 children. Both trials behind that number came from the same research team and population, and the evidence for other xylitol products, and for adults, was too weak to judge (Riley et al., 2015). Because xylitol was added to fluoride, these trials don’t show that xylitol can replace it.
Hydroxyapatite, a calcium phosphate mineral like the main mineral in enamel. In an 18-month trial in adults (189 in the intention-to-treat analysis; 171 completed per protocol), 89.3% of the hydroxyapatite group and 87.4% of the 1,450 ppm fluoride group had no increase in decayed, missing or filled surfaces in the per-protocol analysis, so the hydroxyapatite paste was judged “not worse” than fluoride. Several of the authors worked for the company that makes the toothpaste (Paszynska et al., 2023). A 2025 meta-analysis of 4 trials in people under 25 found no significant difference between hydroxyapatite and fluoride toothpaste for new or worsening decay (Chatzidimitriou et al., 2025), and a 2024 meta-analysis whose authors included manufacturer staff reached a similar conclusion (Pawinska et al., 2024). The trials are still few and fairly short. The details, including who paid for them, are in hydroxyapatite toothpaste vs. fluoride.
How can you tell if a natural toothpaste has fluoride?
Check the label, not the front of the box. In the US, a fluoride toothpaste must call itself an “anticavity” or “fluoride” toothpaste and state that it “aids in the prevention of dental cavities” (or decay) (U.S. Food and Drug Administration, 2026).
- Look for the words “anticavity” or “fluoride” on the box or in the Drug Facts panel.
- Find the active ingredient: sodium fluoride, sodium monofluorophosphate or stannous fluoride (U.S. Food and Drug Administration, 2026).
- Check the strength, if listed. Standard US pastes contain 850 to 1,150 ppm fluoride, and some sodium monofluorophosphate pastes contain 1,500 ppm (U.S. Food and Drug Administration, 2026). The UK’s National Health Service (NHS) advises adults to use at least 1,350 ppm (National Health Service, 2022).
- If there’s no Drug Facts panel and no fluoride listed, assume it is fluoride-free. Hydroxyapatite, xylitol, baking soda or plant extracts on the ingredient list don’t change that.
Then use it well: brush twice a day for about 2 minutes, including last thing at night, and spit out the extra toothpaste instead of rinsing, so the fluoride stays on your teeth (National Health Service, 2022). For toddlers and young children, amounts and strengths differ; see can toddlers use fluoride-free toothpaste?
What it means for you
If you prefer natural ingredients
Choose a natural-brand toothpaste that lists fluoride as its active ingredient. You keep the flavors and ingredients you like and add the protection with the strongest evidence (Walsh et al., 2019).
If you’ve been using fluoride-free toothpaste for months
That isn’t a reason to panic. Brushing twice a day still removed plaque. Switching to a fluoride toothpaste adds protection that trials support, and you can mention the switch at your next checkup so your dentist can look for early decay.
If you want to avoid fluoride altogether
Among fluoride-free options, hydroxyapatite has the most consistent evidence, though it is still limited (Wong & Donnell, 2026). Tell your dentist so they can watch for early decay, and cut down on how often you have sugary snacks and drinks; see how to prevent cavities.
If your gums bleed or feel sore
Herbal and baking soda toothpastes may modestly reduce plaque (Janakiram et al., 2020; Valkenburg et al., 2019), but bleeding gums are a reason to get checked rather than to switch toothpaste on your own.
Questions to ask your dentist
- Am I at high or low risk for cavities?
- Does the toothpaste I use have enough fluoride for my risk?
- Do you see any early decay or white spots that I should watch?
- If I want to avoid fluoride, what would you suggest, and how often should you check my teeth?
- Would a higher-strength fluoride toothpaste help me?
When to see a dentist
Book a dental visit if:
- You notice white, chalky, brown or dark spots on your teeth, or a hole or rough edge you can feel.
- Your teeth have become sensitive to sweets, hot or cold.
- You switched to fluoride-free toothpaste and it has been a while since your last checkup.
- Your gums bleed when you brush or floss, or look red and swollen.
- You get cavities often and want a toothpaste plan that fits your risk.
For severe pain, swelling or a broken tooth, see what to do in a dental emergency.
The bottom line
Natural toothpaste prevents cavities when it contains fluoride. Without fluoride, herbal, baking soda and charcoal pastes may help with plaque or gums, or not at all in charcoal’s case, but they haven’t been shown to prevent decay. Hydroxyapatite is the most promising fluoride-free option, with a few short trials. If you like natural products, the simplest choice is a natural-brand toothpaste that says “anticavity” or “fluoride” on the label, used twice a day.
References
Baysan A. (2026, November 6). Is natural toothpaste really as good as fluoride? Tooth decay expert on the difference. The Conversation. https://theconversation.com/is-natural-toothpaste-really-as-good-as-fluoride-tooth-decay-expert-on-the-difference-294732
Brooks JK, Bashirelahi N, Reynolds MA. (2017). Charcoal and charcoal-based dentifrices: A literature review. Journal of the American Dental Association, 148(9), 661–670. https://doi.org/10.1016/j.adaj.2017.05.001
Chatzidimitriou K, Theodorou K, Seremidi K, Kloukos D, Gizani S, Papaioannou W. (2025). The role of hydroxyapatite-based, fluoride-free toothpastes on the prevention and the remineralization of initial caries lesions: A systematic review and meta-analysis. Journal of Dentistry, 156, 105691. https://doi.org/10.1016/j.jdent.2025.105691
Gupta A, Gallagher JE, Chestnutt IG, Godson J. (2021). Formulation and fluoride content of dentifrices: A review of current patterns. British Dental Journal. Advance online publication. https://doi.org/10.1038/s41415-021-3424-y
Janakiram C, Venkitachalam R, Fontelo P, Iafolla TJ, Dye BA. (2020). Effectiveness of herbal oral care products in reducing dental plaque & gingivitis: A systematic review and meta-analysis. BMC Complementary Medicine and Therapies, 20(1), 43. https://doi.org/10.1186/s12906-020-2812-1
Malik H, Baysan A. (2019). Organic is not better! British Dental Journal, 227(3), 175–176. https://doi.org/10.1038/s41415-019-0628-5
Marinho VC, Higgins JP, Sheiham A, Logan S. (2003). Fluoride toothpastes for preventing dental caries in children and adolescents. Cochrane Database of Systematic Reviews, (1), CD002278. https://doi.org/10.1002/14651858.CD002278
Mehta V, Mathur A, Tripathy S, Sa R, Sharma T. (2024). Effectiveness of herbal oral care products in reducing dental plaque and gingivitis: An overview of systematic reviews. Canadian Journal of Dental Hygiene, 58(2), 120–134. https://pubmed.ncbi.nlm.nih.gov/38974822/
Mehta V, Shetiya SH, Kakodkar P, Janakiram C, Rizwan SA. (2018). Efficacy of herbal dentifrice on the prevention of plaque and gingivitis as compared to conventional dentifrice: A systematic review and meta-analysis. Journal of Indian Society of Periodontology, 22(5), 379–389. https://doi.org/10.4103/jisp.jisp_100_18
National Health Service. (2022). How to keep your teeth clean. https://www.nhs.uk/live-well/healthy-teeth-and-gums/how-to-keep-your-teeth-clean/
Paszynska E, Pawinska M, Enax J, Meyer F, Schulze zur Wiesche E, May TW, et al. (2023). Caries-preventing effect of a hydroxyapatite-toothpaste in adults: An 18-month double-blinded randomized clinical trial. Frontiers in Public Health, 11, 1199728. https://doi.org/10.3389/fpubh.2023.1199728
Pawinska M, Paszynska E, Amaechi BT, Meyer F, Enax J, Limeback H. (2024). Clinical evidence of caries prevention by hydroxyapatite: An updated systematic review and meta-analysis. Journal of Dentistry, 151, 105429. https://doi.org/10.1016/j.jdent.2024.105429
Riley P, Moore D, Ahmed F, Sharif MO, Worthington HV. (2015). Xylitol-containing products for preventing dental caries in children and adults. Cochrane Database of Systematic Reviews, (3), CD010743. https://doi.org/10.1002/14651858.CD010743.pub2
Saikia A, Sivasubramanian A, Muthu MS, Ganesh A, Chandrasekaran K, Kirubakaran R. (2024). Herbal dentifrices for prevention of dental caries in children and adolescents: A systematic review. International Journal of Clinical Pediatric Dentistry, 17(2), 229–236. https://doi.org/10.5005/jp-journals-10005-2780
Taschieri S, Tumedei M, Francetti L, Corbella S, Del Fabbro M. (2022). Efficacy of 67% sodium bicarbonate toothpaste for plaque and gingivitis control: A systematic review and meta-analysis. Journal of Evidence-Based Dental Practice, 22(2), 101709. https://doi.org/10.1016/j.jebdp.2022.101709
Tomás DBM, Pecci-Lloret MP, Guerrero-Gironés J. (2023). Effectiveness and abrasiveness of activated charcoal as a whitening agent: A systematic review of in vitro studies. Annals of Anatomy, 245, 151998. https://doi.org/10.1016/j.aanat.2022.151998
U.S. Food and Drug Administration. (2026). 21 CFR Part 355: Anticaries drug products for over-the-counter human use. Electronic Code of Federal Regulations. https://www.ecfr.gov/current/title-21/chapter-I/subchapter-D/part-355
Valkenburg C, Kashmour Y, Dao A, Van der Weijden GA, Slot DE. (2019). The efficacy of baking soda dentifrice in controlling plaque and gingivitis: A systematic review. International Journal of Dental Hygiene, 17(2), 99–116. https://doi.org/10.1111/idh.12390
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References checked November 2026 · Editorial policy · Report a correction
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