Trace element is ------- % of body weight

TRACE ELEMENTS: These are elements required by the body in quantities of less than a few milligrams per day, It constitutes 0.01% of total body weight. e.g. iron, iodine, fluorine, zinc, copper cobalt, chromium, manganese, molybdenum, selenium, nickel, tin, silicon and vanadium. Ref: Park 25th edition Pgno : 660