I r o n
Is required for many proteins and enzymes, notably hemoglobin to prevent anemia.
Iron is a vital component of red blood cells.
Iron plays a role in the production and release of energy in the body.
18 mg RDA - 45 mg UL
RDA (recommanded dietary allowances) per day 
UL (tolerable upper intake level) per day 
 Food and Drug Administration (FDA)
 Dietary Reference Intakes: Tolerable Upper Intake Levels, Food and Nutrition Board, Institute of Medicine, National Academies, 1997