The vitamin C therapy of Abram Hoffer is safe, tested and effective for most cancers, regardless of type or stage. The author controlled his aggressive prostate cancer for 14 years primarily with vitamin C. He never had surgery, radiation, chemotherapy, or pain. The FDA has penalized doctors who used vitamin C for cancer therapy. Patients are not restricted by FDA. The author offers strategies to get the cooperation of doctors.Hoffer's vitamins are effective either alone or combined with regular therapies. For some patients, Hoffer's vitamins may be the only therapy needed.