"Breast DCIS Histopathology" by KGH / CC BY-SA 3.0

Cancer Quackery on YouTube

Jul 9, 2019

By Steven Novella

Many outlets are covering the story of Mari Lopez, a YouTuber who claimed, along with her niece, Liz Johnson, that a raw vegan diet cured her breast cancer. Johnson recently updated the videos with a notice that Mari Lopez died of cancer in December 2017. She has refused, however, to take down the videos.

The story, unfortunately, is a common one. When people are diagnosed with cancer it is understandably a psychological shock. They face not only the grim possibility of their death, but also the prospect of surgery, chemotherapy, and/or radiation therapy – none of which are pleasant. It is a life-altering event. It also makes people vulnerable – in that situation, who wouldn’t want an escape hatch, a way to get back to their normal life? That is what cancer quackery offers – forget surgery and chemotherapy, just engage in this mild intervention, like a diet change, and your cancer will be gone.

Those who get lured in by this siren song experience one of several possibilities. First, many may still undergo some initial treatment, such as surgery, to treat the cancer, but then refuse adjunctive therapy like chemotherapy or radiation. Some of those patients may, in fact, be cured by the surgery. Often the purpose of the chemotherapy is to reduce the risk of recurrence. Others may forgo any science-based treatment.

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