Radical transparency

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.

Max, founder

5.7 mg
nano-hydroxyapatite per piece
0.30% of piece weight · ~103 mg per box
817 mg
xylitol per piece
1.9 g
per piece, a 13 mm cube
The numbers

The specs, at a glance.

Nano-hydroxyapatite per piece5.7 mg (0.30% of piece weight)
Nano-hydroxyapatite per box~103 mg (18 pieces)
Xylitol per piece817 mg (43%)
Erythritol per piece285 mg (15%)
Piece weight1.9 g
Piece size13 × 13 × 13 mm cube
Pieces per box18 (one a day, 18 days)
Gum basePlant-based (chicle and spruce, with mastic)
SugarNone (no aspartame, no acesulfame K, no titanium dioxide)
AllergenEgg (egg shell powder), not vegan
The active

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.

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.

⏳ Certified particle size in nanometres: requested from our supplier, published here when it arrives
5.7
mg per 1.9 g piece
~103 mg per 18-piece box
What's inside

All fourteen, by weight.

IngredientOrganicRole
XylitolorganicSweetener, oral-health-studied polyol, 817 mg per piece
ErythritolorganicSweetener, 285 mg per piece
Chicle gumorganicPlant gum base
Mastic gumorganicPlant gum base (Chios mastic)
Coconut oilnaturalSoftens the gum base
Spearmint oilorganicFlavor; its terpenes (menthone, carvone, cineol) carry the freshness
Glyceryl monooleateaidEmulsifier, keeps the chew consistent
Calcium bentonite claynaturalTexture and mineral
Fumed silicaaidAnti-caking agent
Nano hydroxyapatitethe active5.7 mg per piece, the same mineral family your enamel is built from
Egg shell powdernaturalNatural calcium source (allergen: egg)
Spruce gumorganicPlant gum base
Myrrh gumorganicResin
Acacia gumorganicBinder
Listed by weight, heaviest first, exactly as they appear in the lab's composition analysis. 🥚 Contains egg · not vegan

One piece a day. A box lasts 18 days. A complement to fluoride brushing, not a replacement.

Third-party checked

Independent safety assessment.

Not classified as hazardous under EU CLP Regulation (EC) No 1272/2013. 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.

Assessed by
Shenzhen CDT Testing Technology Co., Ltd., independent testing laboratory, Shenzhen, China
Report
CDT25082608YRS · Aug 2025
Standards
UN GHS Rev. 9 · EU CLP (EC) No 1272/2013 · REACH
The report is on file. Batch heavy-metal results (lead, cadmium, arsenic, mercury) are the next document we will publish on this page.
The other half of transparency

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.

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.

Questions, answered

Asked by people like you.

How much hydroxyapatite is in each piece?
5.7 mg per 1.9 g piece (0.30% by weight), about 103 mg per 18-piece box. Gum works differently from toothpaste: lower dose, but 10x the contact time and active saliva flow.
Is Minvelle vegan?
No. The formula contains egg shell powder as a natural calcium source. If you avoid egg, this gum is not for you.
Is it sugar-free?
Yes. Sweetened with xylitol (43%) and erythritol (15%) only. No aspartame, no acesulfame K, no sorbitol, no titanium dioxide.
Why "nano" hydroxyapatite?
Particle size changes how the mineral behaves on the tooth surface; smaller particles have more surface area for the same weight. We will publish our certified particle-size figure in nanometres as soon as the supplier specification arrives.