Nature's Way Ultimate Iron - Replenishes iron for vital energy and stamina. Its synergistic blend helps promote healthy red blood cells, featuring liquid liver fractions, which are a rich source of Heme Iron. Heme iron is the most easily absorbable form of iron - up to 33% more absorbable than non-heme iron. Not only do women of childbearing age lose iron each month, an active, athletic lifestyle burns through the body's stores of iron even more quickly. An iron supplement, especially readily absorbed heme iron, can help boost energy and red blood cell levels too.