Needleman study on lead and IQ

The Needleman study, conducted in the 1970s, investigated the impact of lead exposure on children's intelligence. Researchers measured lead levels in children's teeth and compared them to their IQ scores. The findings indicated a strong correlation: children with higher lead exposure tended to have lower IQ scores. This study highlighted the detrimental effects of lead, a toxic metal often found in old paint and plumbing, on cognitive development. The results emphasized the importance of reducing lead exposure to protect children's health and promote better educational outcomes.