IMO this is the other way around. Heavy Metal toxicity desynchronizes Liver Phase I with Phase II resulting in chemical sensitivity.
Heavy Metals are also needed for a heavy parasite infestation.

When my infection was at it's worst, before I was really trying to kill anything, I couldn't even walk into a store because of all the chemicals. It was so bad and I felt so sick the moment I went into a store I actually thought that's what was wrong with me at first, extreme chemical sensitivity, before I started seeing worms. I got dizzy, cotton mouth, belching, my stomach started churning and I had to run to the bathroom. Now I can go into clothing or bookstores with very little problem except when I'm doing a heavy cleanse and things are already dying. That's just too much for the body to filter out along with chemicals.