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What is the actual evidence that acetaminophen causes autism in susceptible babies and children?
Let’s dive in and look at lines of evidence 1 and 2 out of 20 total
This is William Parker, the scientist, with Dr. Parker Reports.
First, in a study published in 2008 by Steve Shultz and colleagues at the University of California, vaccination - with the use of acetaminophen - was associated with about 4-fold more regressive autism than vaccination without acetaminophen Acetaminophen (paracetamol) use, measles-mumps-rubella vaccination, and autistic disorder: the results of a parent survey - PubMed (nih.gov).
Regressive autism is the kind that happens when a child actually loses some brain function when they develop autism.
So, they “regress” backwards developmentally when they develop autism
The second line of evidence deals with the other kind of autism, infantile autism.
In this kind of autism, it appears as if the child was born with it because they never showed signs of typical social development.
However, a 2015 study out of Copenhagen Denmark by scientists Frisch and Simonsen showed that circumcision, a minor procedure often accompanied by acetaminophen use,
is associated with about a 2-fold increased risk of infantile autism Ritual circumcision and risk of autism spectrum disorder in 0- to 9-year-old boys: national cohort study in Denmark - PubMed (nih.gov).
This is telling us that vaccination and circumcision, completely unrelated medical procedures generally given at different times in life, are both connected with autism, and the only known factor the procedures share in common is acetaminophen use.
And that’s the broad strokes on lines of evidence numbers 1 and 2 out of 20 total, with Dr. Parker Reports.
To watch a more detailed video on this topic, please watch our similarly titled video on the WPLab YouTube channel.