<em>Selenium is the only mineral that functions as an antioxidant.</em>
<em>Some vitamins and minerals — including vitamins C and E and the minerals copper, </em><em>zinc,</em><em> and selenium — serve as antioxidants, in addition to other vital roles.</em>
The main function of the kidney is to help regulate everything. So this means pH, vitamins, etc. Kidneys are also useful for filtering vitamins and nutrients.
