Almost all of the nonfiction books and videos on the first search result page promote similar "cures," with only one book based on medical research at spot #8 (The Breakthrough: Immunotherapy and the Race to Cure Cancer) and a book about the engineer who invented the universal microscope (The Cancer Cure That Worked: 50 Years of Suppression)
People should be able to share their personal stories, but Amazon and other tech companies have a responsibility to society, too. Claims like these can have real life and death outcomes. It's not enough to shrug and blame the algorithm because more people click on a book with a carrot on the front cover.