Iron is an essential mineral for proper functioning of our red blood cells and transportation of oxygen throughout the body. Iron is a constituent of hemoglobin which is the oxygen-carrying component of blood. Iron is also part of myoglobin which helps store oxygen in muscle cells. Iron-containing heme is also required for the biological activities of cytochromes and peroxidases. Iron factors in the production of amino acids, collagen, neurotransmitters, & hormones. Since iron is utilized both in hemoglobin and myoglobin, sometimes people who are iron-deficient complain of fatigue even when their bloodwork reveals normal hemoglobin levels. Suggested Use for Adults (18 years and older): As a dietary supplement, take 1 capsule daily, with meals. Do not exceed more than 1 capsule daily unless directed by your healthcare practitioner.