Bone health is everyone's concern. Osteoporosis is one of the most significant public health issues, affecting one in three women and one in five men. In Germany alone, approximately 5 billion euros are incurred annually in direct or indirect healthcare costs. Yet, osteoporosis remains an underestimated, underdiagnosed, and undertreated condition. Only through collaboration among all medical specialties, patients, insurance providers, and political bodies can this situation be changed and improved. It is still a challenging but worthwhile journey! This work is systematically structured, richly illustrated, and aimed at all physicians who want to prevent osteoporosis in their patients early, diagnose it correctly, and treat it successfully, rather than waiting for a fracture to occur. Osteoporosis is now preventable and treatable! New in the 4th edition: completely revised.