Currently, well over 100 clinical studies have been carried out with regard to the use of mistletoe extracts for treatment of various types of tumours. Mistletoe preparations are thus one of the best and most extensively researched medicines used in complementary cancer treatment.
In the final analysis, the studies predominantly indicate that mistletoe therapy is of benefit. The best documented effects are the reduction in the side effects of traditional cancer treatments such as surgery, chemotherapy and radiation therapy and an improvement in the quality of life. In some cases, the appearance of metastases can be delayed and survival time can be prolonged.