Trace element

A trace element is a chemical element whose concentration (or other measure of amount) is very low (a "trace amount"). They are classified into two groups; essential and non-essential. Essential trace elements are needed for many physiological and biochemical processes in both plants and animals. Not only do trace elements play a role in biological processes but they also serve as catalysts to engage in oxidation and reduction mechanisms.
The exact definition depends on the field of science:
Trace elements with chronic diseases.
Here are several potential diseases that are associated with trace elements. Essential and Non-Essential elements play a crucial role in deciding which chronic illness a person could have.
Factors  in drinking water.
Many variables have an important role to play in how trace elements influence drinking water  concentrations.