Study Shows Significant Link Between Mercury and Autism by Dr. Joseph Mercola for Mercola
The controversy over whether mercury overexposure can trigger autism is a long-standing one. A new meta-analysis of previous studies sheds much needed light on the matter, concluding there’s a “significant relationship” between the two.
The review,1,2 published in the September 2020 issue of Pediatric Health, Medicine and Therapeutics, looked at 18 studies conducted between 1982 and 2019 that examined the relationship between concentrations of copper, lead or mercury in blood, plasma, hair or nails and the prevalence of autism. While no relationship was found between autism and copper concentrations, a high degree of correlation was found for mercury and lead.
According to the authors,3 the relationship between mercury and autism is so strong that “the concentration of mercury can be listed as a pathogenic cause (disease-causing) for autism.” This held true even when outlier studies that might unduly influence the results were removed.
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Mercury Is a Causative Factor
In the introduction, the authors point out that studies carried out in this area suggest mercury and other toxins are involved in the cause of autism, which include abnormal brain development that affects social interaction and communication skills.
“Metals’ biological effects are associated with their chemical properties, suggesting that excessive metal exposure can cause brain abnormalities around the world,” the researchers state.4
“Mercury is considered as a risk factor for autism since, according to previous studies, it has been recognized as a neurotrophic toxin. Reduction in mercury content in hair and teeth of the children with autism aroused the low disposal of mercury hypothesis.
Blaurock-Bush et al found that heavy metals are effective in the development of autism disorder. The role of mercury in the pathogenesis of autism has also been proven in other studies …
According to points raised in the present study … it would be quite reasonable to advise prevention of exposure to mercury and lead in children and provision of suitable conditions during the sensitive period of mothers’ pregnancy as vital measures to prevent the disease …”
A 2017 review paper,5 “The Toxicology of Mercury: Current Research and Emerging Trends,” details the “kinetics of this metal,” including “its metabolism, interaction with other metals, distribution, internal doses and targets and reservoir organs.” The paper cites several studies linking mercury and autism among its references, noting that:6
“Autism spectrum disorder (ASD) has been demonstrated to be accompanied by distorted metal homeostasis. The degree to which people are affected by the metals seems to be largely influenced by the individual genetic makeup.
Especially Hg [mercury] exposure has become a suspected causative factor for many pathological conditions, and several sources of exposure to Hg compounds can be listed, including dental amalgam fillings, seafood, vaccines and increasingly from energy saving light bulbs as well.”
