I have heard key factors for autism are imbalanced gut flora and metal toxcity, alot of these "orthomolecular" or nutritional dr's will tell you the very same. I am not saying they are correct in every case, but they must have seen some results in applying treatment for dysbiosis/metal toxcity (high copper low zinc) helping with autism and autistic symtpoms or they wouldnt preech about it. I doubt they'd just make that up without some previous results to back it up. If I had an autistic kid I'd definately get them tested for these known risk factors and see if they treatment helps any.