The phagocytic function of macrophage and delayed hypersensitivity were researched to show weather Forsythia Suspensa leaves tea can enhance the immune function of mice.

• 连翘叶茶可提高小鼠吞噬碳粒的能力，吞噬指数和吞噬百分率增加，减轻小鼠迟发超敏反应时两耳重量之差，说明连翘叶茶可调节小鼠非特异性免疫功能。