Detoxifcation and chelation.

I was going through an article on chelation which I stumpled upon ,It was really interesting in our contest of heavy metal usage in Ayurveda there is no use in going in denial mode about the usage of heavy metals in ayurveda it highly effective in many cases where both modern medicine and conventional ayurveda fails ,I dont find any problem in using properly purified heavy metals ,since they offer good and chelation offers a good way out incase some thing go wrong ,many companies like dabur ,zandu are manufacturing medicines which are used widely ,I dont know if someone has done a reasearch on using chelation drugs .I hoped it was a key areaa of research.Meanwhile chelation is the process by which heavy metals are removed from body.Detoxification with Diethylene triamine pentaacetic acid is one of the chemicals used remove heavy metal from body.detoxification with these is accepted method in USA ,approved by FDA.