Many clinical studies of cancer patients have shown positive results. In one study, 50 lung cancer patients were treated with 6 grams of Cordyceps daily, in conjunction with chemotherapy. Tumors were reduced in size in 46% of the patients.
In a trial involving cancer patients with several different types of tumors, a majority of those treated for two months with 6 grams of Cordyceps daily, reported improved subjective symptoms. In approximately 50% of the patients, white blood cell counts remained high, while tumor size was significantly reduced.