Trace elements are essential minerals found in small amounts in the body, playing crucial roles in various physiological functions. Examples include iron, zinc, copper, and selenium. Despite their tiny quantities, these elements are vital for processes such as enzyme function, hormone production, and immune system support. A deficiency or excess of trace elements can lead to health issues. For instance, insufficient iron can cause anemia, while too much copper may result in toxicity. A balanced diet typically provides adequate trace elements, often found in foods like nuts, seeds, whole grains, and leafy greens.