There usually is research on both sides of any given issue. One needs to examine the studies and determine the flaws that cause differences in results as I did re. the research on hg and Alzheimers.Its analogous to a criminal case where both sides present evidence and a conclusion is drawn.There is a mountain of valid research showing the harmful effects of hg and a small amount of flawed research on the other side. Unfortunately,dentists cite the small amount of research on their side and disregard everything else. Some dentists dont look at any research and just tell their patients its safe or it would have been banned a long time ago.