This Dental Hygienist Busted 8 Dental Health Myths, and We'll Never Brush After Meals Again

Truth: Don't brush your teeth until 30-45 minutes after you're done eating.

Brushing your teeth directly after eating can damage your tooth enamel, Roberts explained, because eating and drinking causes your saliva's pH to drop, making it more acidic. Brushing your teeth at that time means you're "rubbing an acidic environment into your enamel," she said, which wears it away.