Trace elements selenium, vanadium and chromium play an essential role in the nutrition of both animals and humans. Their accumulation in various environments and the subsequent transition of these elements into the food chain significantly affect human and environmental health. This volume emphasizes the integrative aspects of selenium, vanadium and chromium with chapters dedicated to their fundamental chemistry, biochemistry, clinical science and environmental effects. Each chapter focuses on the advancement of scientific knowledge about these trace elements. Important studies on these elements will be described through interdisciplinary approaches.