Hi S.,
I have two children with Autism, and I have never heard of this treatment. Did a psychiatrist, developmental pediatrican, or a nerologist suggest this?
I would warn you of all the "treaments" out there, there are so many that offer "alternative" treatments, but sadly, they also offer false hope, and take your precious resorcese too. Trust me, you will need every cent you have to cover the standard care, and everyone I know that has tried something outside the standard, eventually comes to realize that this is the best chance your child has to do well. Speech/Language therapy, ABA, Occupational Therapy, Physical Therapy, and treating the symptoms that you can with medications is standard care.
Find a really good school, and invest your energy into making sure that he always has the most approriate services while you verify that he makes progress with standard testing.
I don't mean to be a downer, but if this were really an effective treatment with clinical effects, it would be all over the news and would most certainly be big news in the autism community.
Read about placebo effects before you go forward and spend a lot of money on this, if you still want to try, don't abandon standard care, he does not have time to waste.
M.