In healthy women with a range of body iron stores , we aimed to determine effects on the production of circulating non-transferrin-bound iron resulting from the oral administration of 1 ) a supplemental dose of iron ( 60 mg ) with water , 2 ) a supplemental dose of iron ( 60 mg ) with a standard test meal , and 3 ) a fortification dose of iron ( 6 mg ) with a standard test meal .