Heavy metals and Glutathione

We have finally had our wonderful DAN nutritional doctor do some testing to get to the root causes of Wildman's issues. We have so far discovered that he has extremely low iron (like as in almost non existent), borderline diabetes (how can this be when he eats almost no sugar or processed foods?), high cholesterol(in a six year old?), and very low white blood cell count resulting in a depressed immune system. The hair analysis showed that he has high mercury and "very toxic levels" of almost all of the other metals tested for including lead and arsenic. Apparently his body is not producing the protein that binds to the toxins and sheds them. He has started oral Glutathione. I have read amazing stories about the wonders of this supplement but we will have to wait and see. We are on day four but on day three of taking it, he was able to play with our 4 year old neighbor outside all day(10-5 with a couple breaks for lunch and snack) with almost no problems. Never before has this happened, usually thirty minutes is about his limit with any kids! Is it a fluke or the Glutathione, I guess time will tell!