Center for Structural Wellness

High Mercury Levels in Sushi

Center for Structural Wellness

High Mercury Levels in Sushi

12th April 2008

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I know most of you remember this from the New York Times, but I just had to put it out again as it’s importance and relevance is paramount. It’s easy to forget that Mercury is a huge problem when it gets into our nervous system thus compromising our brain function.

What is mercury?
From MSU:

Mercury can exist as monomethylmercury (MeHg). This form of mercury is 100 to 1000 times more toxic then natural mercury. MeHg participates directly in biochemical reactions. MeHg is created both by humans and by the environment. Industry uses MeHg, and in the past there have been poisonings due to industrial discharge. MeHg is also created through biomethylation processes in the environment, and this MeHg bioaccumulates primarily in fish. The greatest source of MeHg is natural biomethylation, and fish consumption is the principal source of MeHg intake for most people.

How do you test to find out your mercury levels?

Blood, urine, and hair analysis can reveal recent or acute mercury poisoning but these tests don’t do well to uncover chronic accumulation.

How does mercury hurt us?

Monomethylmercury (MeHg) is an estimated 100 to 1000 times more toxic (than elemental mercury) to humans. In fact, MeHg seems to specifically target the advanced Central Nervous System (CNS). Until recently, this was a mystery, as the CNS enjoys the protection of the Blood Brain Barrier (BBB). The BBB consists of tightly packed endothelial cells that line the walls of the blood capillaries in the CNS. The key to understanding why MeHg is so toxic is to see that structural similarities in biochemical reactions can lead to active transport of toxins. In this case organisms with a highly advanced CNS, like humans, this active transport can lead to a brain accumulation of MeHg.

As mentioned before, most of our exposure to MeHg comes from bioaccumulations in fish. When we eat contaminated fish, this ingested MeHg easily passes through the intestines and into the bloodstream. The pathway of MeHg from the bloodstream to the brain is complicated, and we think it is easiest to understand the pathway through a list of the various processes involved:

1. MeHg in blood plasma can combine with cysteine, forming a compound that is structurally similar to the amino acid methionine

2. This MeHg-cysteine compound is actively transported into the endothelial cells in the BBB, on the methionine carrier.

3. A high level of reduced glutathione is maintained in the endothelial cells, and the MeHg switches from a cysteine carrier to a glutathione carrier.

4. MeHg-glutathione is actively transported out of the endothelial cells and into the brain.

5. In the brain, the hydrolysis of MeHg-glutathione generates MeHg-cysteine.

6. This MeHg-cysteine can now enter nerve cells in the brain, where it accumulates.

What if you have high levels of mercury?

Chelation therapy is one option for removing mercury. EDTA is used to bond to mercury in your body and help you safely eliminate it through your urine. Click here for ACAM certified doctors in the NY/NJ area.

Note: I looked for information on the negative side effects of chelation therapy and only came across a piece from Quackwatch - the website of the now disgraced Stephen Barrett, who lost in court in 2005 when it was revealed that he was not a real doctor of psychiatry and was actually paid by the American Medical Association, Federal Trade Commission, and the FDA to “de-bunk” alternative and complementary medicine. We must persevere and stay diligent in our research to show how amazing alternative medicine is when it complements the body’s natural healing response. I can not express how happy I am to see Barrett destroyed in the public arena and his covert relationship with the medical industry’s corporate agenda exposed to us all.

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