The warning on the government website was stark. Some products and remedies claiming to treat or cure autism are being marketed deceptively and can be harmful. Among them: chelating agents, hyperbaric oxygen therapies, chlorine dioxide and raw camel milk.
Now that advisory is gone.
The Food and Drug Administration pulled the page down late last year. The federal Department of Health and Human Services told ProPublica in a statement that it retired the webpage “during a routine clean up of dated content at the end of 2025,” noting the page had not been updated since 2019. (An archived version of the page is still available online.)
Some advocates for people with autism don’t understand that decision. “It may be an older page, but those warnings are still necessary,” said Zoe Gross, a director at the Autistic Self Advocacy Network, a nonprofit policy organization run by and for autistic people. “People are still being preyed on by these alternative treatments like chelation and chlorine dioxide. Those can both kill people.”
Chlorine dioxide is a chemical compound that has been used as an industrial disinfectant, a bleaching agent and an ingredient in mouthwash, though with the warning it shouldn’t be swallowed. A ProPublica story examined Sen. Ron Johnson’s endorsement of a new book by Dr. Pierre Kory, which describes the chemical as a “remarkable molecule” that, when diluted and ingested, “works to treat everything from cancer and malaria to autism and COVID.”
Johnson, a Wisconsin Republican who has amplified anti-scientific claims around COVID-19, supplied a blurb for the cover of the book, “The War on Chlorine Dioxide.” He called it “a gripping tale of corruption and courage that will open eyes and prompt serious questions.”
The lack of clear warning from the government on questionable autism treatments is in line with HHS Secretary Robert F. Kennedy Jr.’s rejection of conventional science on autism and vaccine safety. Last spring, Kennedy brought into the agency a vaccine critic who’d promoted treating autistic children with the puberty-blocking drug Lupron. And in January, Kennedy recast an advisory panel on autism, appointing people who have championed the use of pressurized chambers to deliver pure oxygen to children, as well as some who support infusions to draw out heavy metals, a process known as chelation.
Kennedy has embraced various unconventional measures in his fight against what he views as a government system corrupted by special interests. In October 2024, shortly before Donald Trump won the presidency again, Kennedy vowed on social media that the FDA’s “war on public health” was about to end.
“This includes its aggressive suppression of psychedelics, peptides, stem cells, raw milk, hyperbaric therapies, chelating compounds, ivermectin, hydroxychloroquine, vitamins, clean foods, sunshine, exercise, nutraceuticals and anything else that advances human health and can’t be patented by Pharma,” he wrote.
At his confirmation hearing, Kennedy praised Trump for his wide search for a COVID-19 remedy in his first term, which Kennedy said included vaccines, various drugs and “even chlorine dioxide.”
The FDA, dating back to at least 2010, has urged consumers not to purchase or drink chlorine dioxide, frequently marketed as a Miracle Mineral Solution, because “the solution, when mixed, develops into a dangerous bleach which has caused serious and potentially life-threatening side effects.”
The BMJ (formerly the British Medical Journal) has previously reported on the removal of the FDA warnings page. The lack of a warning has also received attention in the Telegram channel Chlorine Dioxide Testimonies.
“Don’t forget the FDA quietly removed warnings about Chlorine Dioxide on their website earlier this year,” read a forwarded post in late December, to which over 100 people reacted with an applauding emoji.
The contributor added a wish for the future: that Kennedy and the FDA commissioner undertake official studies exploring chlorine dioxide’s effects in battling cancer. There currently are no warnings about chlorine dioxide on a consumer page on the FDA website. And HHS did not answer ProPublica’s questions about whether the agency endorses chlorine dioxide as a treatment for autism.
In his book, Kory also expresses optimism about what Kennedy will do. “What I really want is for the FDA to lift its restrictions on studying chlorine dioxide as a therapeutic,” he wrote. “That’s something I’m hoping might finally be possible under this new administration, especially with RFK Jr. as head of Health and Human Services.”
Many autism researchers and advocates have been wary of Kennedy due to his long-held stance that vaccines cause autism. Peer-reviewed studies conducted worldwide, published over decades in leading scientific journals, have rejected such a link.
Under Kennedy, however, the Centers for Disease Control and Prevention overhauled its website on vaccines and autism to assert that studies supporting a link have been ignored by health authorities.
The CDC page retained the headline “Vaccines do not cause Autism” but added an asterisk noting that the phrase remained “due to an agreement with the chair of the U.S. Senate Health, Education, Labor, and Pensions Committee.” In order to win confirmation to his post, Kennedy had promised Sen. Bill Cassidy, a physician, that he would not remove the statement.
Kennedy’s replacement of 21 members who were part of an interagency coordinating committee on autism provides another glimpse into where he wants to take federal policy.
The committee provides advice and recommendations on policies, research and services. It now includes people who have promoted unproven remedies for autism, including suramin, a drug developed to treat sleeping sickness in Africa caused by bites from a tsetse fly; hyperbaric oxygen therapy, typically used for decompression sickness and tissue damage; controversial language techniques; and chelation therapy.
A 5-year-old autistic boy died in Pennsylvania in 2005 after a chelation session. Another 5-year-old boy died in Michigan last year in a hyperbaric chamber fire; his parents wanted him treated for an attention disorder.
The Autistic Self Advocacy Network published a statement on its website saying that the newly reconfigured HHS autism panel is now “overwhelmingly made up of anti-vaccine advocates and peddlers of dangerous quack autism ‘treatments.’”
HHS told ProPublica in an emailed statement that such claims are “false” and that the new members are experienced in research and clinical care. “They are committed to advancing innovation in autism research, diagnosis, treatment, and prevention to align federal policy with current gold-standard science,” HHS said.
Dr. Paul Offit, a pediatrician and director of the Vaccine Education Center at Children’s Hospital of Philadelphia, told ProPublica that Kennedy’s removal of committee members with solid expertise in favor of people who support alternative medicine shows that the secretary is “perfectly willing to embrace bogus therapies.”
Another leading expert, Yale University professor emeritus Dr. Fred Volkmar, who edited the “Handbook of Autism and Pervasive Developmental Disorders,” a definitive guide, said early diagnosis and proven treatments have led to dramatic improvements for people with autism. “These days, probably 70% to 75% of children on the autism spectrum will grow up to be fully independent or semi-independent adults.”
Sadly, however, he said, some parents fall prey to promises of easy and fast cures, when there are none. One of the dangers, he said, is that children are drawn away from treatments that are shown to be beneficial.
“It’s a shame that the federal government is not being more helpful to parents in understanding what does and doesn’t work,” Volkmar said.
