Testing for Mercury
Testing for mercury is the only way to objectively determine if your body is eliminating higher than normal amounts of mercury. But a warning in advance—the ADA and many of its pro-amalgam supporters don’t consider these tests meaningful. Sure, it’s true that testing for mercury has limitations. For example, no test can tell you where and how much mercury is in your body, how much is in your brain or how much damage it has done.
But it’s also true that many health professionals regard testing a valuable diagnostic tool.The medical profession uses a number of tests including fecal metals, blood, urine and hair analysis to determine if mercury is in the body and/or if it’s being excreted.
These tests will designate a level of mercury considered “normal.” What this means is that the majority of people that test at the “safe” level or below won’t yet exhibit symptoms of mercury poisoning. Two issues stand out here. First, “a majority” won’t exhibit symptoms—which means some at those levels will. Second, there is absolutely no “safe” level of mercury—every atom of it in your body is poisoning you to some degree. Plus, not all tests are equal and some can give misleading information or be misinterpreted to the point where you might think you aren’t mercury toxic but actually are.
Some people use the saliva test but I’ve omitted it because it can only detect mercury in the mouth. It neither indicates how much mercury is in the body, nor shows the amount of mercury being removed.
Urine Mercury Testing
As a diagnostic tool for mercury, the urine mercury challenge test is limited. For example, it provides little information about:
• what part of the body the collected mercury came from
• how much mercury is stored and where it’s located
• the health problems the accumulated mercury is causing
• brain and central nervous system mercury
• the mercury the body removes naturally via the feces.
Two types of urine tests are commonly used. One is the unprovoked mercury urine test which doesn’t use a pharmaceutical mercury chelator and only reflects the amount of mercury the body naturally removes via the urine. The other is the urine mercury challenge (provoked) test, which uses a pharmaceutical chelator. Today, DMPS is the most commonly used pharmaceutical chelator for this test, but DMSA is also be used.
Unprovoked Urine Mercury Test
It’s impossible for the unprovoked urine mercury test to accurately reflect the total amount of mercury the body naturally removes every day. That’s because less than 10% of the mercury the body removes naturally passes through the kidneys and out through the urine, while about 90% is eliminated via the feces. Thus, an unprovoked urine mercury test can easily indicate a relatively “safe” reading when the total body burden of mercury could actually be much higher. For example, if the total amount of mercury the body eliminates in one day is 10 mcg, the unprovoked urine test would show less than 1 mcg. And unless you knew your kidneys were functioning normally, you couldn’t determine if what’s coming out is what healthy kidneys would normally remove.
Used alone it could lead you to believe that you aren’t that mercury toxic, when you actually are. I don’t recommend this test for evaluating your body burden of mercury, determining how much mercury is being removed from your body, or for deciding whether or not to participate in a mercury detoxification program.
Urine Mercury Challenge Test
When a urine mercury challenge test is done correctly (especially for those who still have amalgam fillings), the results will show a far greater amount of mercury being removed from the kidneys than the unprovoked urine test will. This is because the pharmaceutical chelators used to capture and remove mercury, DMPS or DMSA, are much more aggressive at removing mercury than the body’s natural chelators. Unlike the body’s natural chelators, pharmaceutical chelators remove the mercury they capture via the kidneys/urine pathway.
However, the challenge test can also be misinterpreted, especially if the kidneys are not functioning normally and are unable to release mercury effectively. When used as a one-time challenge test and evaluated just for mercury levels, this test can also be deceptive. Ideally, the urine challenge test should be done more than once, with the first one being used as a reference. You can then compare the results of future tests with the first one.
It’s also important to note that mercury isn’t the only metal that pharmaceutical chelators will find and remove. For example, DMPS has a greater affinity for other metals, including essential metals/minerals and, according to a study by Daunderer, DMPS will chelate them in the following order:
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Selectivity of DMPS
1. Zinc
6. Lead
2. Tin
7. Iron
3. Copper
8. Cadmium
4. Arsenic
9. Nickel
5. Mercury
10. Chromium
DMPS will remove zinc, tin, copper or arsenic first, so it means less DMPS is available for mercury removal. Therefore, a single urine mercury challenge test could indicate comparatively low levels of mercury and not accurately reflect the real mercury levels in the body. DMPS’s lack of “selective intelligence” (also DMSA) points out the major problem with relying on a pharmaceutical chelator for mercury detoxification. Zinc and copper are essential metals and necessary for life. If they’re removed indiscriminately a mineral imbalance could result, potentially creating serious side effects. The body is far more intelligent and knows what to keep and what to eliminate.
In addition, DMPS does not cross the blood brain barrier and can’t be used to reflect brain and central nervous system mercury levels. Even if a provoked urine test shows mercury levels in the normal range, there can still be a significant amount of mercury in the brain and central nervous system. Thus, when you’re using the urine challenge test, and the results show a normal level of mercury, I suggest it be confirmed it with a fecal metals test—the latter will reflect brain mercury.