10/14/2025
🧪 Why You Should Change Your Toothbrush Every 3 to 4 Months – The Science Behind the Tip:
1. Bristle Wear Reduces Cleaning Power
Studies show that after about 3 months of regular use, toothbrush bristles become frayed and less effective at removing plaque and food debris.¹ This can lead to increased plaque buildup and a higher risk of cavities and gum disease.
2. Bacterial Buildup
Toothbrushes can harbor bacteria, fungi, and even viruses over time — especially when stored in moist environments.² While the risk of infection is low, regularly replacing your toothbrush helps minimize exposure to potentially harmful microbes.
3. Gum Health Protection
Worn bristles can be rough on gums, potentially causing irritation or even recession.³ A fresh brush with soft, intact bristles is gentler and more effective.
4. Post-Illness Hygiene
If you’ve been sick (with a cold, flu, or strep throat), it’s smart to replace your toothbrush afterward to avoid reintroducing pathogens into your system.
