How Often to Change Your Toothbrush for a Healthier Mouth
Dr. Joseph Mercola - Take Control of Your Health
Briana Mercola
4.6 • 1.5K Ratings
🗓️ 18 November 2025
⏱️ ? minutes
Summary
- Most people need a new toothbrush every three to four months, although there are exceptions when the brush needs to be replaced earlier
- Toothbrush contamination occurs naturally from biofilm, moisture, and bathroom aerosols, but you can minimize it by rinsing thoroughly after use, storing upright and uncovered, and keeping your brush several feet from the toilet
- An electric toothbrush head follows the same three-month replacement cycle; replace it sooner if indicator bristles fade, the head feels rough, or cleaning efficiency drops
- For safe sanitizing, consider soaking the head in 3% hydrogen peroxide for 10 to 15 minutes before air-drying. Avoid boiling, dishwashers, or alcohol-based soaks, which deform bristles and reduce cleaning ability
- Here's a simple rule to follow: When the bristles splay or smell musty, or if you've been sick, it's time for a new toothbrush
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