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Science 14 March 1980:
Vol. 207. no. 4436, pp. 1167 - 1176
DOI: 10.1126/science.6986654
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Articles
Science, Vol 207, Issue 4436, 1167-1176
Copyright © 1980 by American Association for the Advancement of Science
Lead in albacore: guide to lead pollution in Americans
DM Settle
and
CC Patterson
Lead contamination in canned tuna, exceeding natural concentrations 10,000-fold, went undiscovered for decades because of analytical error. The magnitude of this pollution effect helps explain the difference between the lead concentration in the diets of present-day Americans (0.2 part per million) and inthe diets of prehistoric peoples (estimated to be less than 0.002 part per million). It also explains how skeletal concentrations of lead in typical Americans became elevated 500-fold above the natural concentrations measured in bones of Peruvians who lived in an unpolluted environment 1800 years ago. It has been tacitly assumed that natural biochemical effects of lead in human cells have been studied, but this is not so because reagents, nutrients, and controls used in laboratory and field studies have been unknowingly contaminated with lead far in excess of naturally occurring levels. An unrecognized form of poisoning caused by this escessive exposure to lead may affect most Americans because magnitudes of biochemical dysfunctions are proportional to degrees of exposure.
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