If I brush my teeth in the morning and fast for 7 hours, my breath still smells kinda ok. But if I brush my teeth before bed then wake after 7 hours, it’s less pleasant. What’s happening to be different?

Question

If I brush my teeth in the morning and fast for 7 hours, my breath still smells kinda ok. But if I brush my teeth before bed then wake after 7 hours, it’s less pleasant. What’s happening to be different?

In: 6

Answer 1

Constantly producing saliva and swallowing during the day flushes out the bacteria and prevents them from accumulating as much. Drier mouth and no swallowing through the night allows more bacteria growth and accumulation. More bacteria = more bacteria poop = more smell.