Mistletoe extracts from various trees have long been recognized as excellent remedies against cancer; studies and case examples support this. In Germany, mistletoe is the most popular herbal remedy in cancer therapy. The mistletoe's strongest power is developed when the tree it grows on and from which it derives nutrients resembles the ailing person in its essence. Johannes Wilkens, a prominent expert in the field, has significantly advanced mistletoe therapy. He presents 13 species of mistletoe in their connection from tree to human. It becomes clear that a differentiated application of mistletoe preparations can significantly increase healing chances. Mistletoe preparations are also successfully used in cancer prevention and in various age-related diseases.