TK--- Hi Anne, Clay will not chelate Hg and there is no Science to back it up. It is supposed to be a very good general detox treatment and seems to help some people feel a lot better, like many things do. It may help in other areas of detox which in turn may help your body excrete Hg on it's own, depending on many factors. It does not hurt any to try it to see if it can make you feel better and help with symptoms. The only way it might chelate is if you used it like a sauna where you emersed yourself in it and sweated but the sweating is what is chelating not the clay.