Cordyceps is a fungus that grows on the larva of insects. More than 360 species but only cordyceps Sinensis is the herbal drug. In Chinese medicine it helps with kidney, lung and helps with fatigue, cough, and most importantly kidney failure. Cordyceps Militarism can be used since C. Sinensis is very hard to find. It is Anti-cancer, Anti bacteria, anti influenza virus, anti thrombotic, antioxidant and protects liver and kidney. I always use this one in patients who have liver or kidney issues