As was already said, you're only recommended to brush your teeth at the start and end of the day, not after lunch. Other dentists have actually begun to say that brushing teeth doesn't even really help bad breath besides covering it up, and if that's what you're concerned about as opposed to the health of your teeth, then breath mints are probably a safer bet anyways. Since this is actually telling you NOT to brush your teeth after meals, I'm taking your comments to mean that you actually do already? Honestly, in the middle of the day, flossing and a breath mint will probably do you far more good than brushing your teeth.