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Lead in Calcium Supplements
Cause for Alarm or Celebration?
Robert P. Heaney, MD
JAMA. 2000;284:1432-1433.
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Lead is an element that everyone can safely be against. Lead causes anemia, hypertension, and brain and kidney damage, and in children stunts growth and causes permanent cognitive impairment and increased aggressive behavior. For human health, lead clearly causes harm and does no good.
Ironically, virtually all the lead in the environment is there as a result of human activity. Under premetallurgical conditions, lead in the earth's crust was locked safely away in deep ore deposits or in marine calcareous beds. As technology advanced, lead was mined and smelted and was a workable and useful metal, finding its way into such diverse applications as Roman water conduits, medieval cathedral roof sheathing, fine crystal, paints with a superior covering characteristic, solders, antiknock compounds for automotive fuels, and, of course, ammunition—ammunition by the countless ton over the last several hundred years. All that lead was transferred through human . . . [Full Text of this Article]
Author Affiliation: Creighton University, Omaha, Neb.
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