"Doctors HATE this one weird trick for weight loss!"
OT, but does anyone know if these adverts actually make money?
Basically, the trick is "weird" because it's not too positive, so as not to make it sound false and unbelievable, not negative either, and uncommon enough to attract attention and pique interest. Of course, overuse of the technique desensitizes the viewers and it will eventually fall out of favor.
Doctors actually like genuine weight loss techniques (like taking more exercise) because their use improves public health. Patent holding megacorps do stand to gain from weak patent enforcement.