Nearly every probiotic supplement on a pharmacy shelf is a capsule you swallow. ProDentim isn't — it's a soft tablet meant to dissolve in the mouth. That sounds like a minor packaging choice until you think through what a swallowed capsule is actually built to do.
Capsule-based probiotics are engineered around surviving stomach acid long enough to reach the intestines, where gut-focused strains do their work. That's the entire point of the capsule format — it's a delivery vehicle built for a destination much further down the digestive tract than your mouth.
If the goal is influencing bacteria in the mouth, sending the organism straight to the gut via a swallowed capsule seems like the wrong route entirely. A dissolving tablet keeps the strains in contact with the mouth for longer, which is the more logically consistent approach if oral bacteria are actually the target. That's a reasonable formulation argument. It's not, on its own, proof that the dissolve format produces a specific measurable result — we'd want a finished-product trial for that, and as we've noted elsewhere on this site, we didn't find one specific to this tablet.
The format makes logical sense for the stated goal. Logical sense and proven outcome aren't the same thing, and we'd rather say that plainly than let a reasonable-sounding mechanism get treated as settled evidence.