Just out of curiosity, which do you do? I do both. I do a quick, not-as-intensive brushing w/ a tad of toothpaste BEFORE breakfast (to get that morning taste out of my mouth). Then, I do a more thorough brushing AFTER eating breakfast. I'm not much of a breakfast person & don't eat breakfast 4 or 5 mornings out of the week though. My BF just brushes AFTER eating.