30 Minutes after Eating
You were probably told to “wait 30 minutes” before hitting the pool after a big meal. That 30 minute rule also applies to brushing your teeth.
The acid content of your last meal leaves tooth enamel softer than it usually is. If you brush your teeth too soon, you risk scraping enamel away and giving the tooth decay process a head start. That in mind, wait 30 minutes after your last bite before you grab your toothbrush.