Note: Single-source report; awaiting corroboration.
NIH-funded researchers examined metal exposure during infancy and its effects on brain and mental health by studying 500 children aged 8 to 14. They analyzed the children’s naturally shed baby teeth, which accumulate metals layer by layer, to pinpoint exposure at specific developmental stages.
The study found that elevated metal levels during infancy, especially between 6 and 9 months old, were linked to a higher risk of mental health symptoms later in childhood, including anxiety, depression, hyperactivity, and attention difficulties. Changes in brain structure and function were also observed in these children.
This critical window coincides with when infants begin crawling and eating solid foods, increasing the possibility of metal exposure. Dr. Megan Horton, co-lead of the study at Mount Sinai Hospital, emphasized that timing of exposure is as important as the exposure itself, suggesting prevention strategies should focus on high-risk periods during early life.