There is a line of thought that the link between childhood vaccines and autism/adhd is the vaccines impact on the digestive system. Long story short, the amount of vaccines given at one time and the frequency of the vaccines alter the digestive tract.

The consequences of the current approach to childhood vaccines causes small intestine bacteria overgrowth (SIBO) which can lead to leaky gut syndrome. SIBO and leaky gut in turn cause inflammation throughout the body. More importantly it alters the function of a special white blood cell that cleans and repairs the brain.

The treatment is something that will probably be surprising at first. It is a combination of fish oil, extra virgin olive oil, and a prebiotic fiber called inulin. There are some cases where it is necessary to replace the inulin with an antibiotic called rifaximin as children become teenagers.

I recommend reading a book called The Nemechek Protocol for Autism and Developmental Disorders. I’ve seen firsthand that it appears to work. I haven’t seen the miraculous seemingly overnight results some people claim. What I have seen is a kid make steady progress who had previously seemed stuck.