Amalgam Fillings, Canned Tuna, & Mercury

In the current issue of the Journal of Toxicological Sciences, researchers calculated the half-life of mercury inside the body. They had volunteers eat the equivalent of one or two cans of tuna a week for a few months to build up their levels, and then during the subsequent washout period measured how quickly mercury levels in their blood and hair dropped.

They calculated the biological half-life of mercury to be on the order of two months. So it takes only about a year after stopping fish consumption for the body to eliminate 99% of the ingested mercury. Of course that’s assuming one isn’t continually exposed to mercury from other sources, such as amalgam fillings.

How does the mercury intake attributable to those silvery dental fillings compare with the mercury intake due to fish consumption? In my NutritionFacts.org video pick today, I calculate how many mercury-containing amalgam tooth fillings are equivalent to eating a can of tuna once a week (see above).

What about fish consumption compared to the levels of mercury in thimerosal-containing vaccines? See my video Mercury in Vaccinations vs. Tuna.

What’s so bad about eating mercury? In my video Fish Fog I describe the neurobehavioral abnormalities in adults linked to mercury intake, though fetal exposure may be most damaging. The resulting loss of child intelligence linked to maternal fish consumption is estimated to cost billions in lost productivity. See my videos Maternal Mercury Levels and The Effect of Canned Tuna on Future Wages. Dolphin safe does not necessarily mean children safe.

In health,
Michael Greger, M.D.

Image credit: TheGiantVermin / Flickr

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115 comments

Jeanne R
Jeanne Rogers8 months ago

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Jeanne R
Jeanne Rogers8 months ago

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Jeanne R
Jeanne Rogers8 months ago

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Jeanne R
Jeanne Rogers8 months ago

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Jeanne R
Jeanne Rogers8 months ago

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W. C
W. C10 months ago

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Jeanne Rogers
Jeanne Rogersabout a year ago

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Kathy Prior
Kathy Prior3 years ago

Right now, I am just sitting here, my right-side is really paralized. If I was diagnose my mercury poisoning sooner. All the anguish for the previous 2 yrs could be avoided. For 2 yrs walking was so painful. I was stuttering, tremors, blurry vision, lost of hearing. After I received my first foot brace. Everything got so more worse. Because my foot is frozen. My foot really hated to be held in the brace. I have 5 kids. I didn't know what to do. I was screaming in pain. I need to just go into nursing home. My church was praying for me. I was such biggest mess. Than one day, with determination I went to see a new doctor. He runs the mercury test. 1-5, 5 was off the charts. I had 22. He ordered me to change my fillings. Than return to his office. After the filling were changed. I had 10 dumps shots in the office. My eyes sight is so much better now. I am not sleeping all the time. All my tremors really went away. I had hearing surgery during the past 2 years. I could not hear before the surgery. Everything was not in my imagination. I was walking, sitting with screaming pain. So this did kill me, but made me soooooo sick. I really just didn't know the truth. During that 2 past year. I actually had more fillings placed in my mouth. I used chew lots of gum. I used to grind my teeth. Something went very wrong. I am trying so hard to move forward. Now all 5 kids are grown. Life just goes on. It is been 14yrs now I had my fillings changed. email anytime km-prior@hotmail.com

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