A Hidden World in Every Smile
There’s more going on in your mouth than you might expect—quietly, helpfully, constantly.
Inside a healthy mouth, scientists estimate there may be as many as 100 billion bacteria living and working at any moment.
That’s more than all the people on Earth—by a long shot.
But here’s the surprising part: many of these microscopic companions aren’t harmful. In fact, they help keep your mouth balanced, breaking down food and protecting against worse invaders. It's a reminder that the tiniest things often play the biggest roles in keeping us well.

Got a little fact like this that surprised you? Please comment below or post it in the forum—it might end up featured in our next edition!