Reading Dr. Sherry Rogers' book, Detoxify or Die, changed my life. She talks about the metal toxicity that we get from the environment, food, drink, and the mercury/nickel from dental work that invades our body's system. She gives a plan on how to get these metals out of our body. She is a huge believer in sweating them out in a far infrared sauna and taking supplements that help us detox which she calls a "detox cocktail".
Last year I was diagnosed with an impaired ability to detox by my medical doctor through a special test that was sent off to a lab in another state. I was also diagnosed with high levels of candida yeast. It is my understanding that yeast runs rampant when there is metals in your body.
When we have metals/chemicals in your body, we cannot completely heal unless we get rid of them as they get in our organs, skin, brain, etc..
http://www.happybodies.com/ (this website has several Dr. Rogers live broadcasts. They are very informative.)
Other books: High Blood Pressure Hoax, Is your Cardiologist Killing You?