It actually acts as a potent chelator of iron and can be a useful supplement if your iron is elevated. (articles.mercola.com)
Use of iron chelators in preventing hydroxyl radical damage: Adult Respiratory Distress Syndrome as an experimental model for the pathophysiology and treatment of oxygen - radical - mediated tissue damage. (healingedge.net)
Sulfur containing amino acids and vitamin C are as good as chelators, as well as some phytochemicals in some vegetables. (westonaprice.org)