Colgate Maximum Cavity Protection with claimed liquid calcium.
Active ingredients - Sodium monofluorophosphate 0.76% W/W (what does W/W mean?), Sodium Fluoride 0.1% W/W.
Those are both forms of fluoride - the other 99% of the toothpaste has no ingredient listing. Where's the calcium? It's obviously not an active ingredient or it would be included as such - so either the claim there is liquid calcium in there is a lie, or the claim it has any effect is bunk.
"Combining liquid calcium and fluoride, this formula is clinically proven to strengthen teeth and repair weak spots in the enamel before cavities start.
Fluoride is our greatest defence against tooth decay. By helping to replace the essential minerals that plaque acids erode from the enamel, and with additional calcium, Colgate Maximum Cavity Protection fluoride toothpaste strengthens teeth and helps prevent the decay that may lead to cavities — both on the enamel covered and root surfaces of teeth."
All I could find on the subject...