The American Dental Association recommends that everyone should brush their teeth once in the morning and again in the evening for at least two minutes, but many wonder whether they should brush in the middle of the day as well. The answer is that it depends. If you’re prone to cavities despite brushing twice a day, then yes, brushing after lunch is advised. If your checkups are typically clear right now with just brushing twice, then you shouldn’t need to do it.