 One common treatment for the symptoms of iron deficiency is the traditional Chinese herbal treatment, Ba-Zhen-Ke-Li BZKL. While studies have shown that BZKL impacts expression of some iron-related proteins and increases endurance performance in rats, no studies have examined the efficacy of BZKL in improving iron markers or physical performance in humans. This study will compare the efficacy of BZKL in improving iron status and physical performance with that of ferrous sulfate supplementation. 