^^^If you clicky the blue link above, you will read the article on the research study using fecal transplants to modify the gut biome and how it has helped some cases of autism.
Reading the link, given the described
bowel related symptoms before they began treatment, I'm not surprised that they experienced behavioral improvements if they fixed the bowel symptoms such that the kid isn't in pain, constipated, and otherwise uncomfortable all the time.
I'm wondering if there is actually a link between autism and unhealthy gut bacteria, which way it goes, etc... Because lots of fat kids have the same problem, and they're not autistic.
Reminds me of a story about a woman with a disabled kid who had a lot of allergies. His teacher was wondering one week why he was responding so much worse and trying to bash his head in. Then the mother asked how much better he was doing, she'd found a new cleansing shampoo that should be making him all sorts of better. Thing is? Shampoo based on coconut. What's one of the things he was allergic to? Coconut. Poor kid had a full scalp rash that was driving him nuts. Get the rash treated, back to old self...