Today we have a website claiming that a 6-year old girl is healed of autism using the usual quackery of supplements and organics. Warning, the website has music.
http://www.regardingcaroline.com/biomedheals
There isn't a lot known about what causes autism, or rather what causes the symptoms to get so severe. There was a story of a girl who is nonverbal, but she can manage on a keyboard and her symptoms seem to be massive overstimulation. There are also cases of some people who have a condition called heavy metal affinity. And while normal people usually shed stuff like lead and mercury, these individuals will not. There are also some who are environmentally sensitive to a severe degree, and autism-like symptoms will worsen because of it.
I can see the point to removing the sulfites, nitrites, food coloring, artificial flavors, gluten and other possible sources of agitation which you'll find in cheap everyday foods, and I can see how
some children become "cured." But to ever claim that this is the cure for autism should be a criminal offense. Regardless of the parent's desperation level.