title: Effect of green tea on volatile sulfur compounds in mouth air.
abstract: Many food products are claimed to be effective in controlling halitosis. Halitosis is caused mainly by volatile sulfur compounds (VSCs) such as H(2)S and CH(3)SH produced in the oral cavity. Oral microorganisms degrade proteinaceous substrates to cysteine and methionine, which are then converted to VSCs. Most treatments for halitosis focus on controlling the number of microorganisms in the oral cavity. Since tea polyphenols have been shown to have antimicrobial and deodorant effects, we have investigated whether green tea powder reduces VSCs in mouth air, and compared its effectiveness with that of other foods which are claimed to control halitosis. Immediately after administering the products, green tea showed the largest reduction in concentration of both H(2)S and CH(3)SH gases, especially CH(3)SH which also demonstrated a better correlation with odor strength than H(2)S; however, no reduction was observed at 1, 2 and 3 h after administration. Chewing gum, mints and parsley-seed oil product did not reduce the concentration of VSCs in mouth air at any time. Toothpaste, mints and green tea strongly inhibited VSCs production in a saliva-putrefaction system, but chewing gum and parsley-seed oil product could not inhibit saliva putrefaction. Toothpaste and green tea also demonstrated strong deodorant activities in vitro, but no significant deodorant activity of mints, chewing gum or parsley-seed oil product were observed. We concluded that green tea was very effective in reducing oral malodor temporarily because of its disinfectant and deodorant activities, whereas other foods were not effective.
authors.affiliation: Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, Canada.
authors.forename: Parth
authors.initials: P
authors.lastname: Lodhia
authors.forename: Ken
authors.initials: K
authors.lastname: Yaegaki
authors.forename: Ali
authors.initials: A
authors.lastname: Khakbaznejad
authors.forename: Toshio
authors.initials: T
authors.lastname: Imai
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Sato
authors.forename: Tomoko
authors.initials: T
authors.lastname: Tanaka
authors.forename: Takatoshi
authors.initials: T
authors.lastname: Murata
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kamoda
mesh_terms: D001944:Breath Tests / Q000379:methods; D002638:Chewing Gum; D002849:Chromatography, Gas / Q000379:methods; D006209:Halitosis / Q000378:metabolism / Q000517:prevention & control*; D006801:Humans; D006862:Hydrogen Sulfide / Q000032:analysis / Q000378:metabolism; D008297:Male; D009055:Mouth / Q000378:metabolism*; D028528:Petroselinum; D010783:Photometry / Q000379:methods; D008517:Phytotherapy; D010938:Plant Oils / Q000008:administration & dosage / Q000494:pharmacology; D028321:Plant Preparations / Q000008:administration & dosage / Q000494:pharmacology; D012463:Saliva / Q000737:chemistry* / Q000187:drug effects / Q000378:metabolism; D012639:Seeds; D013438:Sulfhydryl Compounds / Q000032:analysis / Q000378:metabolism; D013457:Sulfur Compounds / Q000032:analysis / Q000378:metabolism*; D013662:Tea; D013997:Time Factors; D014100:Toothpastes / Q000008:administration & dosage / Q000494:pharmacology; D014835:Volatilization
chemical_list: D002638:Chewing Gum; D010938:Plant Oils; D028321:Plant Preparations; D013438:Sulfhydryl Compounds; D013457:Sulfur Compounds; D013662:Tea; D014100:Toothpastes; D006862:Hydrogen Sulfide