By Kelly Dorfman, M.S., L.N. Experts have long recognized heavy metal toxicity as a cause of or contributor to developmental delays, autism, ADHD and Sensory Processing Disorder.  Recently mercury has replaced lead as the primary culprit because children readily accumulate high levels of mercury from mandatory immunizations. How Do We Protect Against Heavy Metal Toxicity? Resist absorption of heavy metals with a diet rich in anti-oxidants.  Both a comprehensive nutritional supplement regimen and a healthy diet are essential. In a perfect world, one avoids absorbing lead and mercury altogether by taking in adequate amounts of anti-oxidants (such as vitamin C and selenium).  Children on diets low in anti-oxidants (usually from a lack of fruits and vegetables) are much more likely to absorb poisons of all sorts. If several children are exposed to the same amount of heavy metal, the ones in the best nutritional shape will take in less and more efficiently excrete what is absorbed.  This is why injected…