What Actually Causes Cavities (It's Not What You Think)

Plot twist: sugar isn't the villain.

200 million Americans have at least one cavity, and most of them blame sugar. Fair guess, but not quite right. The real culprit is acid, and it's produced by bacteria that already live in your mouth, right now, as you read this.

Here's what's actually happening between your teeth: bacteria feed on the food you leave behind, especially sugars and starches that get trapped in plaque. As they eat, they produce acid. That acid sits on your enamel and slowly dissolves it. Over time, a soft spot forms. That's a cavity.

So the damage isn't being done by what you ate. It's being done by what's still there hours later. The bacteria, and the time you've given them to work.

Which changes everything about why brushing and flossing matter. You're not scrubbing sugar away. You're removing the bacteria and the food that fuels them. Less plaque, less acid, less damage. The math is that simple.

Here's the part most people miss: cavities aren't bad luck. They're a process. And processes can be interrupted.

Two minutes of brushing and two minutes of flossing, twice a day, is enough to break the cycle. Your enamel is stronger than you think, strong enough to last a lifetime if you just don't let the bacteria win.

Your teeth aren't asking for much. Just for you to show up.