Given the link between autism and heavy metal toxicity, it would be unwise to zap before chelation therapy is explored. The Beck forum may be able to clarify the matter of what might be termed cell porosity. Beck's protocol demands that powerful spices be discontinued before electrical therapy because of enhanced cell porosity. No garlic, for example, because the mild toxin in garlic becomes more powerful with increased cell porosity. So zapping would probably let the effects of heavy metals be more destructive. Consider, on the advice of your doctor, chelation first with R-Alpha Lipoic Acid. God bless.