Reports have already been published on the obvious anti-tumor actions of Citrus limonoids. And the activity of GSTase in small intestine mucous membrane and liver can be increased 3-4 times so as to inhibit the cancer-causing actions of chemical carcinogen. Limonoids also have actions in easing pain, relieving inflammation, hypnogenesis, easing angst, tranquilizing, promoting digest and promoting appetite. Besides, it has evident pesticidal actions on plasmodium.