The importance of proper mineral balance is still underestimated, even though diligent research demonstrates that mineral deficiencies, excesses or malabsorption contribute, even cause diseases such as cardiac conditions, learning disabilities, schizophrenia, immune and hormonal dysfunctions and a host of other maladies.

http://orthomolecular.org/library/jom/1990/articles/1990-v05n03-p135.html