hi! i used to regularly go to a dentist and i asked them this question too.. my doctor said that its good to wash our mouth after waking up because when we sleep our mouth becomes dry sometimes and bacteria MIGHT accumulate (especially if you sleep with your mouth open). i also asked if i could just brush my teeth before AND after breakfast but he ...... reply
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9846921/
This study basically says you should wash your mouth before breakfast and brush after you eat for the best reduction in bacteria.
Personally I brush before breakfast because I unwillingly sleep with my mouth open, which allows for worse breath and more bacteria that I don't want to think of swal...... reply
