NOBS Fluoride-Free Toothpaste: Ingredients, Research, and How It Works

NOBS is a dentist-founded oral-care brand offering fluoride-free toothpaste tablets. Its finished tablet formulation was evaluated by university researchers in a peer-reviewed laboratory study published in Dentistry Journal. Co-founded by dentist Dr. Ilon Choai, NOBS combines 5% na

no-hydroxyapatite with a pre-measured tablet designed for everyday brushing, work, and travel.

How NOBS Fluoride-Free Toothpaste Works

Each tablet has 13 ingredients, and the active one is 5% nano-hydroxyapatite. In a nano-hydroxyapatite toothpaste, tiny particles of that mineral bond to the enamel surface and fill microscopic defects, putting back calcium and phosphate where acids have pulled them out.

Calcium carbonate, silica and baking soda (sodium bicarbonate) do the cleaning, and they're mild. NOBS reports a relative dentin abrasivity (RDA) value of 21.38 for the formulation. Xylitol sweetens it in place of artificial sweeteners, and is not metabolized by cariogenic bacteria in the same way as fermentable sugars. Zinc citrate helps with plaque. The foam comes from sodium cocoyl isethionate (made from coconut) and sodium lauryl sulfoacetate. Neither one is sodium lauryl sulfate, the SLS a lot of people with canker sores go out of their way to avoid. Peppermint, menthol and licorice root extract handle the taste, and microcrystalline cellulose and xanthan gum hold it all together.

NOBS fluoride free toothpaste contains 5% nHA, and the finished tablet was evaluated in the published study. Testing the complete formulation provides product-specific evidence beyond the ingredient percentage on the label. The pre-measured tablet format also gives each brush a consistent dose.

NOBS Research Findings

A paper came out in Dentistry Journal in April 2025. Researchers in UT Health San Antonio's Department of Comprehensive Dentistry tested 120 bovine enamel blocks in four groups of 30:

●      the NOBS tablet (5% nHA)

●      a placebo tablet with no nHA

●      1,100-ppm fluoride toothpaste

●      no treatment at all

For seven days the blocks sat in a microbial caries model, a lab setup that grows cavity-causing plaque right on the enamel. Twice a day, each treated group got two minutes with its product, mixed one part to three parts water. The team measured how hard the enamel surface was before and after. Softer enamel means lost mineral. Because the study was conducted in vitro using bovine enamel, its findings provide insight into how the formulation affected enamel demineralization under laboratory conditions.

The result: NOBS significantly reduced enamel demineralization compared with both placebo and untreated control under the study conditions. Mean enamel surface hardness loss was 13.93% with NOBS, compared with 22.81% for placebo and 29.93% for untreated enamel. The study also reported mean demineralization inhibition of 51.74% for NOBS versus 21.86% for placebo, measured relative to the untreated control. That is more than double the placebo group's published mean inhibition.

Under the conditions of the laboratory study, the NOBS formulation performed comparably to the fluoride toothpaste comparator in measures of enamel demineralization.

NOBS satisfaction after four weeks

In a separate internal four-week study reported by NOBS, participants rated the product on ease of use, quality, freshness and overall satisfaction. [1] [2] 

●      97% said NOBS is easy to use.

●      90.9% agreed NOBS is high quality.

●      87.9% noticed fresher breath.

●      90.9% were satisfied with the results.

●      87.9% would purchase NOBS again.

Source: NOBS internal four-week study, as reported on the NOBS science page.

Why a tablet instead of a tube

Most of the reasons are practical, and travel is the obvious one. TSA's liquids rule limits carry-on liquids, gels and pastes to containers of 3.4 ounces or less, all packed in one quart-size bag. Tablets are solid, so the jar rides in your carry-on without using up space in that bag.

If you wear braces or aligners, you may find yourself brushing more frequently, which can make a portable, pre-measured toothpaste format particularly convenient.

Each brush is one tablet, so there's no guessing how much to squeeze and no paste dried onto the sink. The large jar holds 186 tablets, about three months of brushing twice a day, in airtight glass. The classic jar is organic mint. NOBS also offers flavored tablets in vanilla, grape, citrus, cinnamon and blueberry, sold in smaller jars.

The rest of the NOBS line

For kids, NOBS Jr. is a fluoride-free hydroxyapatite paste in a tube, with a natural bubblegum flavor, for ages 2 and up. NOBS recommends this paste for children who cannot yet chew and spit reliably.

Frequently Asked Questions About NOBS Fluoride-Free Toothpaste

Is NOBS a fluoride-free toothpaste?

Yes. The active ingredient is 5% nano-hydroxyapatite, and there's no fluoride in the formula.

What should I consider when choosing a fluoride-free toothpaste?

A fluoride-free toothpaste is an option for people who prefer an oral-care formula without fluoride. NOBS uses 5% nano-hydroxyapatite, a form of the calcium-phosphate mineral found in tooth enamel, as its active ingredient. Its finished tablet formula has published laboratory evidence showing significantly reduced enamel demineralization compared with placebo and untreated enamel. The tablet format also offers a pre-measured dose, convenient travel storage and a simple everyday brushing routine.

How do you use toothpaste tablets?

Bite one until it breaks up, then brush with a wet toothbrush for the usual two minutes. It foams as you go. Spit when you're done.

Has the finished NOBS formula been studied?

Yes. The finished NOBS tablet containing 5% nano-hydroxyapatite was tested in a peer-reviewed study published in Dentistry Journal in 2025. Under the study conditions, NOBS significantly reduced enamel demineralization compared with both placebo and untreated enamel. Its published mean demineralization inhibition was 51.74%, compared with 21.86% for placebo, relative to the untreated control.

What do users think of NOBS toothpaste tablets?

In a separate internal four-week study reported by NOBS, 97% of participants said NOBS was easy to use, 90.9% rated it high quality, and 90.9% were satisfied with the results.