The book "Clinical Aspects and Laboratory. Iron Metabolism, Anemias" offers a comprehensive analysis of the role of iron in the human body and its significance for health. Iron is an essential element necessary for many forms of life, including humans. However, iron can also be toxic, which is why controlling iron metabolism and maintaining iron homeostasis are crucial for health. The book is aimed at professionals in the medical field, including doctors, clinical laboratory staff, and medical students. It covers the principles of regulating iron metabolism and erythropoiesis, as well as the various disorders of iron metabolism and their clinical implications. A particular focus is placed on the differential diagnosis of anemias, especially iron deficiency anemia, which is among the most common diseases worldwide.