How Often Should You Actually Replace Your Toothbrush?

The American Dental Association recommends replacing your toothbrush every 3 to 4 months. Many people stretch it way beyond that, but over time bristles lose their shape and flexibility. And a worn toothbrush removes up to 30% less plaque than a fresh one!

There are also hygiene concerns. Bacteria build up in the bristles over time, especially if your toothbrush sits in a damp bathroom. And if you've been sick, your brush has been too. Replacing it after a cold or flu is one of those small moves that actually makes a difference.

Here's the simplest rule: if the bristles are fraying or splaying outward, it's time. Don't wait for the 3-month mark. When the bristles go, the clean goes with them.