I know that some of the chelators can make things worse while in the process having amalgams removed the only ones that can help are either algin or activated charcoal they do not bind to mercury like chelators but absorb some of the loose mercury floating around in the blood stream and remove it without mobilizing more , if you choose activated charcoal remember it must be taken 2 hours from suppliments or medications or it will absorb them too , I had very good results with it during my amalgam removal