Got a feeling inoculations have something to answer for too, they give a set sized dosage by age, not by body weight so to me that isnt very smart.

Not proved, but to my mind if your body is in hypo mode trying to fight stuff off that shouldnt be there ,whether its chemicals from food, water or some medicines; its all got the same stresses on the brain to sensory mode.

One of mine we thought had Aspergers which is on the Autism spectrum but after many tests it turns out it is Sensory perception disorder which mimics many of the Autism traits so there is hundreds of thousands of kids with this, as well as other disorders which border on them.
Depression can play a big part in of most of them,anxiety as well.