It can help prevent bad morning breath if you rinse with CB12 at night, before you go to bed, and in the morning when you wake up. MEDA, the company behind CB12, says "morning breath" occurs because the amount of saliva in the mouth - which helps clean food debris and smelly bacteria from the mouth - decreases at night, when Are you asleep. Your mouth dries out and becomes an ideal environment for the growth of bacteria. "Morning breath" is quite normal and happens to everyone, but it can be easily avoided. Rinsing with CB12 mouthwash at night before going to bed can help prevent 'morning breath'. Studies show that the combination of zinc and chlorhexidine contained in CB12 in a low concentration is a very effective inhibitor of CSVs (volatile sulfur compounds: these compounds are released by bacteria found between the teeth, in the pockets of the gums and in the pits at the back of the tongue, where they break down food particles.