system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is toothpaste different from taking antibiotics? Does bacteria in your mouth become resistant to toothpaste?
gpt
Toothpaste doesn't really kill bacteria. It's there to *take away the stuff that the bad bacteria eat*. Basically, the bacteria that cause cavities take sugar and turn it into acid, which eats through the enamel on your teeth. 

Toothpaste helps clean the sugar away, and may shift some bacteria out, but the main advantage of toothpaste over just brushing is fluoride. This helps strengthen your enamel.