In a recent prospective observational study done in Germany with cancer patients in two differently treated cohorts it was observed that an improvement in quality of life was observed in patients taking the addition of homeopathic treatment. In the laboratory, research on homeopathy and cancer that does exist is limited but has some clues for effects that cannot be ignored. A study that was conducted at The University of Texas MD Anderson Cancer Center, revealed that four ultradilute remedies (Carcinosin, Phytolacca, Conium, and Thuja) exerted preferential cytotoxic effects against two breast cancer cell lines, causing cell cycle delay/arrest and apoptosis without affecting the normal mammary epithelial cells. Since patients with advanced breast cancer are the highest CAM users amongst patients affected by cancer, it was thought that a feasibility study with this group of patients, would be a rational first step in proceeding to evaluate this controversial method of care, if it has merit or not.