<prompt> The mineral having sparing action on vitamin ECalciumIronIodineSelenium  <response>: The element selenium is found in the enzyme glutathione peroxidase that destroys free radicals. Thus, Se is also involved in antioxidant functions like vitamin E, and both of them act synergistically. To a certain extent, Se can spare the requirement vitamin E, and vice versa.Ref : Satyanarayana, 3rd ed, pg. 129 