I'm afraid that I must agree with Sandi. If it chelates, it will not distinguish between the mercury in our tissues and the mercury in our amalgams. It's very dangerous to steer people in the direction of using any chelation agents while they have amalgams in their mouth. Some have been seriously hurt by doing this very thing. If anyone chooses to do so, they must know that they can do damage that will not be reversed, from everything I've read on the subject.