Although I have no experience with the issues of amalgam fillings and mercury toxicity in general, I feel it reasonable to point out with regard to the issue of protein and vegetarianism/veganism, that animal products don't have a monopoly on protein. Your body breaks proteins down into amino acids, regardless of the source. The sulphurous side chains are also not exclusive to animal products. A combination of legumes and whole grains provides all the necessary amino acids. As far as any particular practitioner's anecdotal experience with the recovery of vegetarians and vegans, I cannot comment, but I would be interested in the sample size of vegetarians and/or vegans in that practitioner's experience, and a larger picture of the patents' health before treatment.