Clinic in The London company, run by a former artisan ice cream maker, treats stage four cancer patients by locking them naked from the neck down in a plastic bag and gassing them with oxidizing chlorine dioxide, an industrial bleach. Even the person performing it admits it is “dangerous.”
Alastair Jessel, who runs the Battersea Park clinic in south London, spoke earlier this month on a podcast popular with people who believe that chlorine dioxide is a wonder drug that can be used to treat everything from cancer and HIV to Covid-19 and autism.
“Keeping naked people in a bag is something that probably a lot of doctors struggle with in a clinical setting, but as an entrepreneur sitting in front of me with a naked person in front of me, it wasn’t something I had planned on for the last few years, but what was accomplished was truly incredible,” Jessel said earlier this month on a chlorine dioxide podcast.
The typical “protocol” is for users to take a few drops of a chlorine dioxide solution every day. Jessel uses a different, rarely used “protocol” first proposed by Andreas Kalcker, a German who in recent decades has been one of the main proponents of using a bleach-like solution. The treatment involves sealing naked people in a plastic bag from the neck down before direct contact with the undiluted gaseous form of chlorine dioxide.
Jessel said on the podcast that he asked in a private discussion group of other chlorine dioxide influencers if anyone had ever tried the so-called Kalcker G Protocol, but no one responded.
“Protocol G is obviously probably the most dangerous protocol of all,” Jessel said, adding: “No one has ever done it. So I don’t know if I’m the first person in the UK to do it, but I’m definitely rare.”
When writing about the uses of Protocol G on his website, Kalcker makes no mention of cancer treatment. “When used properly, with simple precautions such as avoiding inhalation of fumes, it is a well-tolerated procedure,” Kalcker tells WIRED, dismissing Jessel’s description of the procedure as hazardous. While he won’t comment on the effectiveness of this treatment for all cancers, he says that for skin cancer, Protocol G would be “directly relevant.”
“There is currently no scientific evidence that exposure to chlorine dioxide gas is a safe and effective treatment for people with cancer,” says Caroline Geraghty, senior specialist nurse information officer at Cancer Research UK. “Taking unproven cancer treatments or remedies instead of those that are medically approved can affect the effectiveness of the treatment and cause dangerous side effects. It is extremely important that people talk to their oncologist, GP or specialist nurse before trying any alternative treatments.”
Jessel did not respond to a detailed list of questions, simply writing: “I can only refer you to Protocol G contained in Dr. Andreas Kalcker’s book Forbidden health. That’s all I do.”
Pseudoscientific scammers have been doing this for decades commercial chlorine dioxide solutions—sold under various names, such as Miracle Mineral Solution, as “medicines” for a wide range of diseases and disorders. There is no credible evidence to support any of these claims.
However, over the past year, interest in chlorine dioxide has increased after U.S. Secretary of Health Robert F. Kennedy Jr. he mentioned chlorine dioxide during a question about President Donald Trump’s Operation Warp Speed during his Senate hearing in January 2025. Then a year ago, the Food and Drug Administration removed a warning about the substance from its website. While the agency says the removal was part of a routine process of archiving venerable pages on its site, it has had the effect of emboldening the bleacher community.