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Antioxidant Activity of Herbal Teas Available on the Korean Market
Takako Yokozawat,Kyeoung Im Lee,Hiroshi Kashiwagi,Eun Ju Cho,Hae Young Chung 한국식품영양과학회 1999 Preventive Nutrition and Food Science Vol.4 No.2
The effects of aqueous extracts from Korean commercial teas on excessive free radicals were examined utilizing spin trapping, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and lipid peroxidation. A potent scavenging effect of green tea and oriental senna tea was found using spin trapping. The most effective tea against the DPPH radical was green tea, followed in order by pine leaf tea, Chinese gutta percha tea and oriental senna tea. Similar to the effects of DPPH radical, green tea, pine leaf tea, Chinese gutta percha tea and oriental senna tea had an inhibitory effect on lipid peroxidation. These findings predict that Korean tea is a promising material for scavenging free radicals, and for curing diseases related to free-radical reactions.