MY ND's school of thought is to clear up the digestive issues, restore some good flora, close the ileocecal valve, if necessary (that is how the yeast gets systemic to begin with)....and then you can start chelating. If your colon and kidneys are full of yeast and not eliminating efficiently, you are just going to recycle the metals.

There is a good book called "Eating Alive" by Dr John Matsen; in it he explains the importance of restoring digestion to facilitate efficient mercury chelation in very simple and comical layman's terms. In my mind, it is a very good investment.

Sandi