Also, can you imagine a doctor telling you to follow x diet, to take this and that supplements, and then you see that it doesn't work. What is the doctor going to tell you? There is no known strict protocol that officially work 100%, especially since the standard american diet is often considered to
There is also the possibility that the pharmaceuticals companies are manipulating doctors so yeast is considered mainly a naturopathic quackery, since they might be responsible for the increase in intestinal problems, especially due to Antibiotics , and that it is too widespread.
Doctors are victims too. It is too easy to see alternative remedies as quackery, especially with the inconsistent results they usually give. They're often intelligent persons who studied a lot and who are learning what is thrown at them just like sponges absorb water.
Something has to happen in at least the next 50 years, or it will be hell.