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

Underbrush vs VanMan: 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 Underbrush VanMan
Hydroxyapatite per piece not disclosed not disclosed
Particle form and size Nano
particle size not stated
Bovine-bone HAp
nano/non-nano not stated
Full ingredient list Yes
no amounts
Yes
6 ingredients, no amounts
Lab reports public No No
Studies cited on site Yes
39 numbered citations
No
Money-back guarantee not disclosed Yes, no time window stated
Verifiability scorecard Underbrush VanMan
Dose disclosed not disclosed not disclosed
Documents downloadable 0 0
Guarantee in writing No
gum is final sale; guarantee only via a paid add-on
Yes
full refund, no time window stated
Reviews verifiable off-site No
on-site widget only
Yes
Amazon: 135 ratings, 3.5★

Underbrush does not publish a per-piece dose, offers 0, and lists its guarantee as not disclosed. VanMan does not publish a per-piece dose, offers 0, and lists its guarantee as yes, no time window stated. 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.

This comparison is generated from the Hydroxyapatite Gum Database, maintained by Minvelle. We sell a gum in this category and appear in the same database under identical rules, which is exactly why every cell here is sourced instead of scored.