URINE samples from hundreds of French children have yielded evidence for a link between autism and exposure to heavy metals. If validated, the findings might mean some cases of autism could be treated with drugs that purge the body of heavy metals.
Samples from children with autism contained abnormally high levels of a family of proteins called porphyrins, which are precursors in the production of haem, the oxygen-carrying component in haemoglobin. Heavy metals block haem production, causing porphyrins to accumulate in urine. Concentrations of one molecule, coproporphyrin, were 2.6 times as high in urine from children with autism as in…
