"Well, first of all, my kids were not on the spectrum - probably ADHD, leaky gut, heavy parasites, and food allergies ....sound/light sensitivities and very shy. My son wouldn't even go upstairs by himself - he was afraid.
The first improvement we noticed was after our first round..."
It is great to hear about the early improvement. The little ones seem to improve quickly.
The symptoms sound like what we frequently see in the adult chelation groups. I also have ADD. The most surprising improvement after 1.3 yrs of chelation is that I'm less introverted. So many members say that Hg affects one's personality. I also have sound sensitivity and had some food and odor sensitivities as well. These are mostly gone.
I bet part of the improvement for your little one is in adrenal/stress response.