Chelating and proper supplementing can only be made possible if you first have a hair analysis to see what your status is. In matt's document Ascaris 123 you see all the scientific reference to everything. If you look up chelation and chlorella you will see the reference to those too. He is recommending chlorella because it actually chelates mercury which is a very common toxic metal in most people. You will find reference to what chelates what in his document.
I dont doubt cutler or any other person's protocol can be helpful. However the fact that he is a doctor is not reassuring to me, as he knows nothing about parasites, like most doctors. Knowing enough of parasites and the other factors like chelation, supplementinh etc is scarce. I would recommend dr Yu more than anyone if you are certainly looking for a doctor.
Others have chelated with zeolites, charcoal and Bentonite besides chlorella but you need to find out what exactly do those chelate after having your hair analysis at hand. Long standing parasitic infections create huge mineral deficiencies as well as acidosis so you really need to carefully chelate while treating your infevtion AND supplement. Hair analysis should be repeated regularly to see what improvements are made. I hope this clears up some questions.