 
By David Morgan, Reuters
WASHINGTON — Children with autism have mercury levels similar to those of other kids, suggesting the mysterious disorder is caused by a range of factors rather than “a single smoking gun,” researchers said on Monday.
The researchers at the University of California, Davis, initially found that children aged 2 to 5 with autism had mercury levels lower than other children because the autistic kids ate less fish, the biggest source of mercury that shows up in the blood.
But when the data were adjusted for lower fish consumption, blood-mercury concentrations among the autistic children were roughly similar to those developing typically. The children with autism had mercury levels in line with national norms.
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