Heavy metals, which are not always metals at all but may be dense metal-like elements, are found naturally in the environment. They are also used widely in manufacturing and can contaminate soil, air, food, and water. As industrial pollutants, they may be highly persistent and concentrate in the environment. Some of them, such as selenium, are required in trace amounts by the body for normal function but can be toxic at higher levels. Significant concentrations of any of the heavy metals can be irritating or damaging to the body.
Read the articles below to discover more about heavy metals and how they affect health.