Method for extracting catechin from carambola roots

The invention discloses a method for extracting catechin from carambola roots. The method comprises the following steps: S1, crushing the carambola roots, then adding the crushed carambola roots intowater, heating and filtering to obtain an aqueous extract solution; S2, separating, purifying and drying the aqueous extract solution to obtain the catechin. The method for extracting the catechin from the carambola roots, disclosed by the invention, proves that the catechin can be obtained by separating and purifying from the carambola root aqueous extract for the first time; the catechin shows the inhibition activity of DPP-IV enzyme in vitro and is expected to be used for treating type II diabetes. 本发明公开了种从杨桃根中提取儿茶素的方法，包括以下步骤：S1、将杨桃根粉碎后，加入水中，加热过滤得水提液；S2、将水提液分离提纯、干燥后得儿茶素。本发明公开的从杨桃根中提取儿茶素的方法，首次证明能够从杨桃根水提取物中分离纯化得到儿茶素，其表现出体外DPP-IV酶抑制活性，有望用于治疗2型糖尿病。