Every ingredient, every number, every test.
Most gum labels hide behind a "proprietary blend" and a flavour name. This page is the opposite: every ingredient, the exact doses, the piece size, and what an independent laboratory found when it assessed the formula. Where a number is still missing, it says so, because we are waiting on the lab, not because we are hiding it.
The short version: each piece of Minvelle gum contains 5.7 mg of nano-hydroxyapatite (0.30% of piece weight), 817 mg xylitol and 285 mg erythritol in a 1.9 g piece. One box holds 18 pieces, one a day. The full 14-ingredient formula and the independent lab assessment are published below.
Max, founder · page last reviewed August 10, 2026
The specs, at a glance.
Nano-hydroxyapatite, measured.
Each piece carries 5.7 mg of nano-hydroxyapatite, the same mineral family your enamel is built from. Hydroxyapatite has been studied at the ingredient level in Japan since 1980. The first hydroxyapatite toothpaste launched there in 1980 (Sangi, company history); Japan approved the ingredient as an anti-caries agent in 1993 (O’Hagan-Wong et al., Odontology 2022). Ours is synthetic and lab-made, with no animal source at any stage; the manufacturer confirmed that in writing in August 2026.
Why put it in a gum at all? Contact time. Toothpaste is in your mouth for about two minutes. A piece of gum is chewed for twenty or more, and chewing drives saliva flow, which is what moves minerals onto the tooth surface. The gum sits alongside fluoride brushing, it does not replace it.
✓ Particle size: rod-shaped, 200 nm long, 20–50 nm wide, per supplier specification (updated August 2026)The particle width of 20–50 nm sits inside the EU's 1–100 nm nanomaterial definition, so "nano-hydroxyapatite" is not just the common name here, it is the regulatory category, and we label it accordingly. The full explanation is in the FAQ below.
All fourteen, by weight.
| Ingredient | Organic | Role |
|---|---|---|
| Xylitol | organic | Sweetener, oral-health-studied polyol, 817 mg per piece |
| Erythritol | organic | Sweetener, 285 mg per piece |
| Chicle gum | organic | Plant gum base |
| Mastic gum | organic | Plant gum base (Chios mastic) |
| Coconut oil | natural | Softens the gum base |
| Spearmint oil | organic | Flavor; its terpenes (menthone, carvone, cineol) carry the freshness |
| Glyceryl monooleate | aid | Emulsifier, keeps the chew consistent |
| Calcium bentonite clay | natural | Texture and mineral |
| Fumed silica | aid | Anti-caking agent |
| Nano hydroxyapatite | the active | 5.7 mg per piece, the same mineral family your enamel is built from |
| Egg shell powder | natural | Natural calcium source (allergen: egg) |
| Spruce gum | organic | Plant gum base |
| Myrrh gum | organic | Resin |
| Acacia gum | organic | Binder |
One piece a day. A box lasts 18 days. A complement to fluoride brushing, not a replacement.
Independent safety assessment.
Independent safety assessment of the Minvelle nano-hydroxyapatite chewing gum formula · Shenzhen CDT Testing Technology Co., Ltd., report CDT25082608YRS, August 2025:
Not classified as hazardous under EU CLP Regulation (EC) No 1272/2008. No hazard labelling applicable.
Toxicology: clean across the board. Not classified for acute toxicity (oral, dermal, inhalation), skin or eye irritation, sensitisation, mutagenicity, carcinogenicity or reproductive toxicity.
REACH-clean. No candidate-list substances, no Annex XIV substances, no Annex XVII restricted substances.
Look up your batch.
Every box prints a batch number on the base. Find it here, with the certificate behind it.
| Batch number | Production period | Certificate of analysis |
|---|---|---|
| 20251025002SC07 | Produced October 2025 tested November 2025 |
CoA CDT25102502COS (PDF) Heavy metals and microbiology, all clean. |
What we do not claim.
No cure promises
We will not tell you this gum rebuilds enamel or fixes cavities, because no finished-product trial says so. That is the honest version, and it is the only one we sell.
What the evidence supports
Xylitol drives saliva flow within about 20 minutes of chewing, and saliva is the mechanism that carries minerals to the tooth surface. Documented in Dawes & Macpherson, Caries Research 1992, and the basis of the EU’s authorized health claim for sugar-free gum (Regulation 432/2012; EFSA Journal 2011;9(6):2266).
Not convinced? Fine.
If that is not enough for you, that is fine. 30-day money-back guarantee either way: send the unopened box back and you get a full refund.
Asked by people like you.
How much hydroxyapatite is in each piece?
Is Minvelle vegan?
Is the hydroxyapatite synthetic or animal-derived?
Is it sugar-free?
Why "nano" hydroxyapatite?
Report updates by email.
When this report changes, we log it: new batch certificate, updated spec, corrected value. Get the changes as they happen.