Just food for thought:
http://www.ncbi.nlm.nih.gov/entrez/q...&dopt=Abstract
Remember that a greater chance of autism may be caused by expsoure to mercury, and that there are multiple routes of exposure.
One thing I remember reading a long time ago suggested that mothers with more mercury fillings were more likely to children with autism than mothers with less mercury fillings.
Keep in mind that thinking about health can be complex. For example, strep bacteria causes strep throat . . .
But what if the strep bacteria grew out of hand because you took product X that lowered your immune system. What caused the strep throat? The bacteria or the product x? Or both?