Investigation the properties antioxidant and flanoids in green tea (Systematic review)

Back ground:Tea is one of the most consumed beverages in the world, it is divided into three categories: fermented (black tea), non-fermented( green tea) and semi fermented( oolong tea).Among the various types of tea, green tea is a rich source of antioxidant compounds called catechins , which prevents devastation oxidation reactions in the brain. The aim of this study is to checking the properties antioxidant and flanoids in tea plants. Method: This review was performed within articles published at PubMed, Google scholar, Scopus and SID from 2000 to 2019. The keywords were green tea, antioxidant, flanoids and properties. By searching this database, 76 articles were found, 53 of them were not related with investigating and 11 of them by reading abstract were removed. All articles chosen from English and Persian articles.Findings:Finally, 12 articles were included in the study, in some of the articles reported that tea has antioxidant properties and among different types of tea, green tea has more antioxidantproperties.In 3 articles that performed on the effect of tea's antioxidant properties on reducing the oxidation process of vegetable oils including sunflower, rapeseed, canola, olive, expressed: Using extract of green tea reduces the process of oxidation of vegetable oils. Another study that examining the antioxidant effect against isoniazid hepatotoxicity in rats was showed that polyphenols, which are major constituents of green tea, are creating superoxide, hydrogen peroxide and Nitric acid, that have beneficial pharmacological against isoniazid hepatotoxicity. Conclusion:It seems that tea, especially green tea has antioxidant properties that can be used as an herbal medicine with antioxidant properties as a dietary supplement to prevent some Diseases such as liver toxicity, therefore need to be more research done at this topic.

کلیدواژه ها:

Green tea ، Antioxidant ، Flanoids ، Properties