Paul Offit's new book covers the evidence for many surgeries, medications, and screening tests that have been proven ineffective and harmful yet are still being used by doctors who refuse to follow the science.
Biofield tuning uses tuning forks to assess the health of clients. This study of inter-rater agreement is a prime example of Tooth Fairy science.
Dr. McDougall is a maverick who disagrees with most experts. He recommends a high starch, low fat diet with no dairy or animal foods and other prohibitions. Its severe restrictions make it nutritionally questionable and it has never been properly tested in a controlled study.
Many health-related products are sold through multilevel marketing (MLM); now the FTC is warning them to stop making false claims about COVID-19. The tactics that MLMs use to promote all their products are deceptive and are a variation on the old Ponzi scam.