Really soy free?

I know your product says soy free - however, my son reacts to even the tiniest bit of soy - lately I have gotten burned on several items that say *soy free* but they I find out they have some soy lecithin or soy oil in them that cause issues for him.  Can you confirm that there is no soy whatsoever for me? Although our product is derived from Soy Beans, it does not contain any soy DNA protein because they are destroyed during distillation.  Our product is certified to be PCR-negative which is the industry recognized classification for products that have been produced, and distilled, to remove any and all contaminates that could affect purity. Scientists state that there is no difference between a GMO and non-GMO product that is PCR-negative.