Double Blind Clinical Study of SmartMouth Anti-Halitosis Treatment Rinse. A month long double-blind clinical study was also conducted to determine whether SmartMouth Anti-Halitosis Treatment Rinse (AHTR), with continual use, enhances its ability to inhibit malodor and prolongs this inhibition sufficiently to eliminate morning odor ('morning breath'). The study compared SmartMouth AHTR with distilled water as the control. The study included 48 subjects and tested the extent The results showed that the subjects using distilled water displayed the greatest degree of odor. SmartMouth AHTR significantly reduced the odor to non-odorous levels as measured with the Halimeter, and eliminated all organoleptic (sniffing/smelling) odor at the two and four week intervals. This study supports the conclusion that rinsing with SmartMouth Anti Halitosis Treatment Rinse provides sustained protection for at least twelve hours and thus enables elimination of morning breath. to which the test rinses reduced morning breath. The subjects were tested in the morning with no oral hygiene practiced at least 12 hours prior to their appointments. Readings were done first to establish baseline levels of odor. The subjects were then given either SmartMouth AHTR or a water control. Each was instructed to brush his or her teeth with a standard toothpaste and then to rinse with the test rinse for thirty seconds twice a day with no other home care regimen practiced. The subjects were tested again in two weeks and in four weeks. As before, this was done in the morning, without any oral hygiene practiced at least twelve hours prior to each appointment. The results showed that the subjects using distilled water displayed the greatest degree of odor. SmartMouth AHTR significantly reduced the odor to non-odorous levels as measured with the Halimeter, and eliminated all organoleptic (sniffing/smelling) odor at the two and four week intervals. This study supports the conclusion that rinsing with SmartMouth Anti Halitosis Treatment Rinse provides sustained protection for at least twelve hours and thus enables elimination of morning breath.