Medical early detection aims to identify symptoms in a timely manner to improve the treatment of diseases. This idea is widespread, but it is naive. Especially in cancer medicine, early detection often uncovers early stages of cancer that would never have caused problems for the affected individuals. Serious studies show that for every life saved through breast cancer screening, up to ten women are unnecessarily subjected to chemotherapy, radiation, or surgery. The general health check-up at the doctor, known here as "Check-up 35," also seems pointless, as studies involving over 150,000 participants have demonstrated that such check-ups have no impact on mortality. However, they do create more "sick" individuals. Physicians look for exceeded threshold values, such as blood sugar, blood pressure, and cholesterol. These thresholds have been continuously lowered by industry-affiliated medical societies in recent years. In this book, the award-winning science journalist and bestselling author Frank Wittig discusses the merits and pitfalls of all relevant screening measures, from mammography to skin cancer early detection to colonoscopy. He shares absurd, humorous, and moving experiences from his research and demonstrates that medical early detection is a profit-driven industry that primarily benefits doctors and the pharmaceutical industry, rather than necessarily making patients healthier.