Is Lead in the U.S. Food Supply Decreasing Our IQ?

‘The environmental advocacy group Environmental Defense Fund (EDF) on June 15 released a study about dietary lead exposure, with a focus on food intended for babies and young children.
Using a Federal Drug Administration (FDA) database of food samples, EDF reported some pretty worrying numbers, most remarkably in fruit juice samples intended for children. For example, 89 percent of the baby food grape juice samples had detectable levels of lead in them.
As researchers who served as independent reviewers on the EDF report, we think it raises important concerns about the safety of our food supply. Since EDF primarily focused on exposure (whether lead was detectable or not), we were interested to see if we could get a better sense of the magnitude of risk. Specifically, we examined potential IQ loss and the percentage of samples with high lead concentrations.’
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Testing the IQ of American People?