From the Hydroxyapatite Gum Database · data checked July 11, 2026

Minvelle vs Underbrush: what each discloses.

Two hydroxyapatite gums, compared only on what each brand publicly discloses: dose, particle data, ingredients, lab documents and guarantee terms. Same rows as the public database this page is generated from.

What each brand publishes Minvelle Underbrush
Hydroxyapatite per piece 5.7 mg nano-HAp
0.30% of a 1.9 g piece
 not disclosed
Particle form and size Nano, 200 nm (supplier-stated)
disclosed: sits above the EU’s <100 nm nanomaterial definition
 Nano
particle size not stated
Full ingredient list Yes
all 14, with per-piece weights
 Yes
no amounts
Lab reports public Yes
MSDS + batch CoA published (manufacturer redacted, disclosed)
 No
Studies cited on site Partial
pH study sourced; history claims being back-referenced
 Yes
39 numbered citations
Money-back guarantee 30 days not disclosed
Verifiability scorecard Minvelle Underbrush
Dose disclosed Yes
5.7 mg nano per piece
 not disclosed
Documents downloadable 2
MSDS + batch CoA (PDF)
 0
Guarantee in writing Yes
30-day, unopened boxes
 No
gum is final sale; guarantee only via a paid add-on
Reviews verifiable off-site No
Trustpilot profile claimed, shows 0 reviews so far
 No
on-site widget only

Minvelle publishes its per-piece dose, offers 2, and lists its guarantee as 30 days. Underbrush does not publish a per-piece dose, offers 0, and lists its guarantee as not disclosed. Every cell above is what each brand states publicly, nothing is scored on taste or opinion; where a cell says not disclosed, the claim could not be verified from the brand’s own materials.

Full disclosure

Minvelle maintains this database, and sits in it.

Same rows, same standards, our own cells included, weak spots and all. Judge us by the table, not this button.

See the gum