How would you propose to do randomized controled studies -by asigning people to a group to get Amalgams and others to a group to get composites? It's an indisputable scientific fact that mercury is toxic to virtually every organ in the body. Therefore, all that needs to be done to show the toxicity of Amalgam is to show that people with Amalgam have hg exposure levels that are above govt safety levels and that hg expoure levels of people with Amalgam are far higher than those with no fillings. There are tons of studiies showing a direct correlation between # Amalgams and mercury levels . Saliva and fecal levels of hg in people with many fillings are often 1000% of those of people with no fillings.