The book “Medical and biological significance of elements and their compounds”, created by the team of authors, is a unique and in-depth study that covers the most important aspects of the interaction of chemical elements with living organisms. This work will become an indispensable source of knowledge for students, graduate students, teachers and anyone interested in medicine, biology and chemistry. The book examines key elements and their compounds that play a critical role in biological processes. The authors analyze in detail how micro and macronutrients affect human health, their biological availability, and the consequences of their lack or excess in the body. The reader will be able to learn about the importance of elements such as iron, calcium, magnesium, zinc and many others, as well as how they are involved in metabolism, immune system maintenance and organ functioning. Who can like this book? First of all, it will be of interest to students of medical and biological specialties, as well as teachers who are looking for relevant and scientifically based materials for their courses . The book will also attract the attention of researchers working in the field of nutrition, toxicology and ecology, as well as anyone who seeks to better understand how chemical elements affect human health and well-being. The topics raised in the book cover a wide range of issues, including the environmental impact of climate change.