Based on speculation that
mercury poisoning may trigger the symptoms of
autism,
[20] chelation therapy is widely used by alternative therapists to treat autism, with some surveys[
citation needed] suggesting 2–8% of children with autism have had the therapy. Parents either have a doctor use a treatment for lead poisoning, or buy unregulated supplements.
[21] Aspies For Freedom, an autistic rights organization, considers this use of chelation therapy unethical and potentially dangerous.
[2] There is strong
epidemiological evidence that refutes links between environmental triggers, in particular
thiomersal-containing
vaccines, and the onset of autistic symptoms.
[22][23][24][25] There is no scientific support for chelation therapy as a treatment for autism.
[12][26]