Antioxidant Activity of Herbal Teas Available on the Korean Market

  • Takako (Research Institute for Wakan-Yaku, Medical and Pharmaceutical Univeristy) ;
  • Lee, Kyeoung-Im (College of Pharmacy, Pusan Natioal University) ;
  • Hiroshi Kashiwagi (Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University) ;
  • Cho, Eun-Ju (College of Pharmacy, Pusan National University) ;
  • Chung, Hae-Young (College of Pharmacy, Pusan National University)
  • Published : 1999.06.01

Abstract

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 dound using sipin trapping. The most effective teasagainst the DPPH radical was green tea, followed inorder by pine leak tea, Chinese gutta percha tea and orietnal senna tea. Similar to the effects of DPPH radical , green tea, pine leaf tea, Chinese gutta percha tea and oriential 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.