I know 100% that if we hadn't changed DS's diet any medical professional seeing his behaviour when under the "influence" of the ingredients would want to diagnose him with something.
Last summer I finally realized that he could NOT have high fructose corn syrup. He had some behavioural stuff that was worrying me, but I finally put it together while having fun at an outdoor festival. Normal day normal day normal day. Then I did the unusual and let him having a lollipop...did some crafts in the kids area, he got very restless, went to do something else, got a bit aggressive towards the other kids, and when I decided time was up b/c of his aggressiveness, he attacked me. He's very tall and I'm short, and he was using his fingernails and just flipping out. Trying to choke me, scratched my face up and my neck...but when I looked in his eyes I saw fear.
We finally got home (had to walk b/c that's how we got there, we live in downtown) and he passed out for hours.
Finally realized it was the high fructose corn syrup.
Since then we've realized it's also corn syrup and even corn syrup solids. Found out that Dole Whips have corn syrup solids after watching him go Tas (tasmanian devil) after eating one at
Disneyland. Took me 5 minutes to catch him while he was running in circles, wagging his head back and forth, not caring if he ran into anyone. Then he fell asleep.
Found out that Uncrustables are loaded with it all.
Can you tell that our Disney trips have changed, food-wise?
Many ice creams have various forms of it in there; we have to get only organic, or certain types of certain brands (some haggen dasz is good, a Breyers or Dryers natural is good, but only certain flavors). Reeses PB cups are fine, but m&ms are not.
Again at DLR we let him decorate a cookie at Woody's RoundUp, and he ate some frosting and some cookie, and within 20 minutes was freaking out again...realized the ingredients were on the box, and again, it was loaded with those ingredients.
It's possible that it might be regular old corn, but no one wants to experiment with it, not even DS. He knows very well that the stuff turns him into a "dragon", as we put it, and he does NOT like being a dragon!
We have also since realized that HFCS causes DH to fall asleep. He can be wide awake, then he'll have a soda, and within 5 minutes he's nodding off. It's very freaky.
Anyway, it's very very very worth looking into as a starting point. Check out all labels, see if there are corresponding behaviours after meal-times, and what he's eating. It can't hurt, and in fact even if it doesn't correspond, really, no one should be eating those pseudo-foods. DS now enjoys pancakes and waffles with powdered sugar instead of syrup while out (though it should be noted that powdered sugar is mixed with corn starch, so the most sensitive can't even have that) and organic pure maple syrup when home. We have all had to go to a more natural, less-processed, diet, and it's good for all of us.
Though it's frustrating, to find item after item with one or more of those ingredients. Even my son, not even 4, sighs when I read yet another label to find those dreaded words, and he'll say "why they put high fruk corn srup in there?" I don't know, son, I guess they are too lazy to figure out a REAL food to make the overall food taste and feel like they want it to taste/feel. It's very frustrating.
But I'm so happy to say that we are ALL happier. Except for the oopsie moments when I let him have something that I find out later has one or more of those ingredients, he is golden and totally fine. And when I do find out while he is eating something (at DCA, eating an Uncrustable from the kid's meal, when I looked at the package and my heart plummeted) I tell him that it's in there, and if he starts to feel like a dragon that he can breathe and talk and try to keep calm, but that I totally understand if he feels rotten. Then I try to find someplace safe for him to run it all off.
It's a good place to start!