Underbrush vs Greco Gum: an honest comparison (2026)
Underbrush and Greco Gum barely compete: one's a hydroxyapatite oral-care gum, the other a pure mastic chew. Here's which job each does, and which you want.
hydroxyapatite gum
2 articles
Underbrush gum review: is it legit? (I chewed it for a month)
I bought Underbrush and chewed it for a month, most days, to test the claims. My honest verdict on the viral remineralizing gum and whether it does what it says.