The common thread is liver issues.... both candida and heavy metals cause the liver to struggle and the hormones to go bizerk.
Still you are right, candida and heavy metal toxicity often go hand in hand, here is my penny of a thought on mercury://www.curezone.org/blogs/m.asp?f=308&i=31
Mercury is the most difficult to get rid or (a hair analysis will tell you if you have mercury contamination). Chelation is the solution, BUT i would not advise anyone to start chelation therapy before reading 300 pages on the topic (attending the chelation forum here at Curezone might help to.