20 years of the successful treatment of cancer by biotronic healing. Why is cancer on the rise? Explanations for the rise of cancer, from the biotronic point of view, have been described, for example, in the book by Josef Zezulka Bytí/Existence – Philosophy for Life, which was published by the Spiritual University Bytí. Cancer always develops, above all, due to the excessive intake of carcinogens, which are not part of natural food, and which the body fails in the long term to resist in such huge volumes. The second reason is a lack of vital substances in nutrition. We are used to eating food that goes through difficult phases of the food processing industry, and, on top of that, we use inappropriate methods of home preparation, such as the use of a microwave, which results in a complete loss of the vital, nutritious value of food. Moreover, due to our lifestyle, we also suffer from a lack of vitality because we do not spend enough time in nature etc. All of the above influence cancer development.