Iron
 

This element from the periodic table is one of the most abundant minerals on earth. It is no wonder that it plays so vital a role in our biological function. It forms the most basic parts of many of our enzymes and proteins. For us Iron is chiefly involved in the transportation of oxygen from our blood cells to our vital organs. It is also a vital part of the orchestra of cell growth, differentiation and maintenance. A person who does not get enough iron has trouble getting proper oxygen delivery, tires easily and does not have good immune system function. On the other hand too much Iron can result in toxicity or in extreme cases, death.