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Sources of Heavy Metals
There are a few key sources of heavy metals in the body. Mercury has come through vaccines (via thimerisol which is used as a preservative), amalgam fillings (which leech significant amounts into the body for many years) and through the air (coal-burning power plants produce high levels of mercury).
As mercury is pumped into the oceans as industrial waste, fish are contaminated, and that is another significant source. A naturopathic doctor recently revealed that after eating quite a bit of seafood for one year, her mercury levels jumped up from 0.9 in to a scary 37 . The so called “normal” level is less than 4. Mercury is a poison at any level!
Lead is the other heavy metal that is often elevated. In the past there was lead in gas (petrol) paints, pipes and so on. Even though many of those sources have been eradicated today, high lead levels still persist in the environment.
The drinking water in San Diego, California, was once sent off for evaluation and was reported to be high in lead, so tap water might be one possible source. Older homes might still have lead-based paint and pipes, another potential source. Our food, water and air are not quite what they used to be.
Testing methods
Fortunately, there are good testing methods that can be used to assess the damage, and good protocols to remedy it. One test is a challenge or provoked urine test. We know that metals don’t stay in the blood stream for very long, so a regular blood test won’t give useful information unless there has been a very recent exposure.
Hair tests are another method but can be difficult to interpret. If your result is low it could simply mean that are not a good excretor of mercury. On the other hand high mercury could mean either you have high levels or that you were excreting it. So hair is not really a very good indicator.
The provoked urine test involves taking sample of urine before and after taking a set dose of a heavy metal chelator (an agent that helps to bind and excrete metals from the body). Urine is collected for a defined period of time afterwards. Some doctors say take a sample exactly 2 hours afterwards but others prefer you to collect the urine for 6 – 24 hours and send a small sample to the laboratory.
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