干细胞因子(stem cell factor,SCF)结合抑制剂可作为药物、准药物或食品(或饮料),用来预防过敏性症状。本专利用重组人型 c-测试盒方法评价以下植物及其提取物的 SCF 结合抑制活性,受试的植物包括:鸡纳树、蛇麻草、粗齿绣球、银杏、绞股蓝、贯叶 Stem cell factor (SCF) binding inhibitors can be used as drugs, quasi-drugs or foods (or beverages) to prevent allergic symptoms. This patent uses the recombinant human c-test kit method to evaluate the SCF binding inhibition activity of the following plants and their extracts. The tested plants include: Napier, hop, coarse tooth hydrangea, ginkgo biloba, gynostemma pentaphyllum, and perleaved leaves.