Pitts G, Brogdon C, Hu L, Masurat T, Pianotti R, Schumann P
J Dent Res. 1983 Jun;62(6):738-42. doi: 10.1177/00220345830620061001.
Inter-related determinants of oral malodor were measured over a three-hour period in 30 human subjects after mouthwash treatments. Re-odoration was important to mouthwash activity for 30 min. At post-treatment times of 60-180 min, the anti-odor activity of the product is due solely to its anti-microbial action.