Pretty much everyone will have some level of heavy metals in their body. You cannot avoid it. What's difficult to determine is... if what your body is storing, and where it's stored, is causing your problems.

For some, reducing the overall burden on the body provides health benefits. But no one will be able to remove 100% of it. And chelation therapy cannot target which organs to pull heavy metals from. That said, any drop in your heavy metal burden should be a good thing.

The heavy metal challenge is not really bogus but can be misleading or misused if you use the test results as the only criteria to move forward with chelation. Like Mrs. D said, you get can get your hair analyzed as well. Doctor's Data also does a red blood cell elements test. It looks at what's in your red blood cell. Both good and bad. It checks for minerals as well as toxic elements. This may give you a better understanding of what's in your tissues. Thinking being, if it's at toxic level in red blood cells, then there's a good chance you have too much in your body.

If you have any amalgam filling in your mouth, then it's not a good idea to do chelation therapy for mercury until you have them removed safely by a dentist who is experience in the process.

I don't a have good answer for you on this. It is controversial, in both the measuring of heavy metals and how to chelate effectively and safely. I personally would not rely on "quackwatch" for any unbiased opinion. There's a couple of these types of blogs out there whose sole purpose is to discredit alternative/complementary medicine.