Study shows similar mercury levels in autistic children

It’s one of those stories that you hear relatively often in the world of Autism. For as many studies as there are supporting the idea that Mercury, a metal found in medication, dental fillings and water, has an affect on those with Autism, there is another study that disproves the theory. Though it’s known that one of the symptoms of Mercury Poisoning is impairment of speech, hearing, walking and other developmental elements, it’s not completely proven that it in fact causes Autism, despite its ability to cause developmental impairments in children.

A recent study done at the University of California-Davis aimed at comparing the mercury levels in children.

“We looked at blood-mercury levels in children who had autism and children who did not have autism,” said lead author Irva Hertz-Picciotto, a professor of environmental and occupational health.

“The bottom line is that blood-mercury levels in both populations were essentially the same. However, this analysis did not address a causal role, because we measured mercury after the diagnosis was made.”

The study itself focused on children ages 2-5 years old, and investigated their mercury intake in things such as fish consumption, nasal sprays, and vaccinations.

Children who had dental fillings made of mercury and were known to chew gum had higher mercury-blood levels. Also, children who consumed fresh water fish, such as tuna.

The study was carried out on 452 children: 249 were diagnosed as autistic, 143 were deemed to be developing normally and 60 showed retarded development such as Down Syndrome.

“Just as autism is complex, with great variation in severity and presentation, it is highly likely that its causes will be found to be equally complex. It’s time to abandon the idea that a single ‘smoking gun’ will emerge to explain why so many children are developing autism,” said Hertz-Picciotto.


  1. Anthony says

    What is the name of the test to determand mercury levels, then how can u reduce the levels???? If possible!!!!!

  2. John A. de Vreedem DC DACNB says


    To test mercury levels in the bloodstream is not really valid beause of the blood/brainbarrier.
    The mercury taken up in braintissue should therefore be evaluted, which of course will be very difficult to do.

  3. Zacharias Vassilakis says

    - The main difference between autistic and non autistic kids there is not the blood –
    mercury levels, if any, but the difference of the accumulated burden of Hg and
    incorporated in their tissues during the first months of their life.
    – The study of Dr. James Adams, after a 3 days of rejection treatment gave 5,94 ti-
    mes bigger quantities of Hg rejected by the autistic kids (6,42 μgr/gr Creatinine).
    – Only 1 μgr of Hg, if diffused in a kid of 10 kg of body weight, corresponds to 300
    millions of toxic atoms per mgr of alive tissue.
    – Non one biomedical procedure could run properly in such environment.
    Reject mercury seems to be the first priority.
    How reject mercury is the main problem.

  4. admin says

    Hi Zacharias, thanks for your input. What you meant to said is that the toxin burden of heavy metal is more serious in the total accumulation form inside the body vs. in the blood which is more of a recent exposure.

  5. admin says

    Hi John, I agreed about not having any test available for testing mercury in the brain. However, you could indirectly tested for mercury in the brain/CNS using Neopterin/Biopterin which maps out neuro-inflammation then you also do 8-oxo-guanosine to see the oxidative stress in the CNS. We can provide this services.

  6. admin says

    Hi Anthony, To test for merury you could test serum/blood (recent exposure), hair (general screening), urine or stool. Really, it depends on what is your objective and how you are going to use the info generated. Contact us if you need help.

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