2. Learning difficulties

Since lead affects cognitive development of young children, it can result in learning difficulties that can be carried into adulthood. Magnetic resonance imaging (MRI) shows that the brain of adults exposed to lead during their childhood has a smaller volume.
One study investigating the long-term effects of lead exposure in early childhood showed that the earlier the child is diagnosed with lead poisoning, the more likely he is to be diagnosed with a reading disability. Also, almost half of the subjects in the study who had early childhood lead poisoning left high school before graduation. It is worth mentioning that this cognitive impairment secondary to lead intoxication can take place even at very low levels.
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