The best nutrition book ever written, in my opinion, is Weston A. Price, DDS 'Nutrition and Physical Degeneration' written in 1939.
All Price had then was the power of observation, being a dentist Price hypothosized that the health of the teeth, gums, and supporting oral anatomy was one of the best ways to predict health and the impact of that persons diet on their health. After traveling the world his findings revealed that the most indiginous people with the most natural diets had incredible teeth. If those people were introduced to the white man diet their health and the health of their mouths deteriorated rapidly.
Mark Schauss, in the video below discusses the impact of mercury and mercury amalgam fillings on your health. Its a quick watch and gets a hair thick towards the end, but the takeaway is to avoid and remove mercury fillings and do it safely.
As a neurotoxin mercury effects many things but one of the primary and most important functions is our RMR (resting metabollic rate) it is where the majority of our calories are burned and a chief important piece to the body composition game.
A quick way to test your metabolism is to test your temperature first thing in the morning. A healthy metabolism should reflect a body temperature of exactly 98.6 degrees, as a sidenote women do have fluctuations depending on where they are for the monthly cycle, the average should be 98.6 though.
Every degree below 98.6 is a big hit on your metabolism. I once trained a lady that had a morning temperature of 92, yikes! She also had 13 mercury fillings. Once she had those removed, corrected her diet and adjusted her supplementation her temp returned to normal.
Now I'm no dentist and won't claim to have gone to school that long, but I have heard some professionals say that having mercury fillings replaced is not necessary and mercury is stable without leaching from the filling. Once again, not a dentist, but the USDA has a zero tolerance for lead in the human body, but mercury is 10 times more toxic than lead.
I'll leave you guys with a little action item here. There are a few natural dentists in the area, of which I've referred a few but read the article from the link below and go to the other link in the article to find local practitioners to help you. I don't want to see any of your beautiful smiles change at all.