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Lead: The typical daily dietary intake of lead
is 15 to 100 µg. Significant sources of lead include seafood and
plant foodstuffs grown under high lead conditions. In rats and pigs,
lead deficiency reportedly has adverse effects including depressed
growth and disturbed iron metabolism. Although lead may have
beneficial effects in small amounts, lead toxicity is of more
concern than lead deficiency. Lead toxicity results in anemia,
kidney damage and central nervous abnormalities. Ingestion of high
amounts of lead from the environment by children, particularly when
anemic, has been associated with reduced intelligence and impaired
motor function.
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