Another explanation may be that children with autism simply have more allergies than those who don't. Or they might have disease where the same underlying defect causes both an immune disturbance and behavioral problems, as Coury speculated.
"I don't think our study was really addressing that," Murray said.
Other experts agreed.
"This study shows that autism is not related to celiac disease," said Dr. Peter Green, director of the celiac disease center at Columbia University Medical School.
"All these kids are on a gluten-free diet," Green said, even though "there's no evidence it's a causal relationship."
For more on autism spectrum disorders, visit the U.S. Centers for Disease Control and Prevention.
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