The controversial 2025 Danish study on aluminum in vaccines should be immediately retracted because the study’s own data contradict the authors’ conclusion, according to a new peer-reviewed article by Children’s Health Defense (CHD) Chief Scientific Officer Brian Hooker and Senior Research Scientist Karl Jablonowski.
Hooker and Jablonowski’s article was published this week in Integrative Medicine: A Clinician’s Journal.
Jablonowski told The Defender that the Danish study, published July 15, 2025, in the Annals of Internal Medicine, is “a good lesson in how bad science can propagate.”
The study claimed to find no link between aluminum in childhood vaccines and 50 negative health outcomes, including autism, asthma and autoimmune disorders.
Since then, the Danish study has been cited 36 times in published research as evidence that aluminum adjuvants in vaccines are safe, Jablonowski said.
The study received so much media and academic attention that it ranked in the top 5% of all research outputs, according to Altmetric, a data influence company.
But that attention doesn’t mean the Danish authors’ conclusions were correct, Jablonowski said. In their critique, he and Hooker presented a detailed analysis showing a mismatch between the Danish study’s data and the authors’ conclusions.
“The study that convinced the world that aluminum in vaccines does not cause autism was a facade,” Jablonowski said. That facade crumbled under scrutiny, he said.
“We were left with a heap of unanswered questions and evidence that aluminum in vaccines is positively associated with neurodevelopmental disorders.”
Hellbound and Down 