Trace elements are essential minerals and nutrients that are required by living organisms in very small quantities. These elements play crucial roles in various biological processes including growth, development, and overall health. Examples of trace elements include iron, zinc, selenium, copper, and iodine. Research in this area focuses on understanding the functions of these elements in living organisms, their metabolism, and the potential health impacts of deficiencies or excess levels. Additionally, researchers explore ways to optimize the intake and absorption of trace elements through diet and supplementation to promote overall well-being.