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- W21282235 abstract "Publisher Summary Tea polyphenols or tea catechins taken orally remain in the oral cavity for a certain time. The interaction of catechins with the oral membrane gives one a sense of astringency. The threshold of EGCg, which is the most astringent, is somewhere around 180 ppm in plain water. It is most probable that tea polyphenols remain in the oral cavity at very low concentrations without one being aware of their presence. In exerting the potency of radical scavenging actions of tea catechins, the OH group at the 4' position in the B ring was confirmed to be essential. It was also confirmed that nitrogen in amines binds to the 4' carbon in the B ring to deodorize the smell. It is of interest to find a situation, where catechins work as antioxidants and then as deodorizers. This chapter reviews several features of tea polyphenols in relation to oral hygiene. It has been confirmed separately that tea catechins interfere with H. pylori in the stomach, α-amylase or lipids in the small intestine, and bacterial flora in the large intestine, all of them in very favorable ways for one's good health. The amount of catechins absorbed from the intestine, their metabolism, and fate inside the body are yet partly elucidated." @default.
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- W21282235 date "1999-01-01" @default.
- W21282235 modified "2023-09-23" @default.
- W21282235 title "Actions of Tea Polyphenols in Oral Hygiene" @default.
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- W21282235 doi "https://doi.org/10.1016/b978-012543590-1/50029-9" @default.
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