It's interesting to note that FDA Commissioner Mark McClellan, M.D., Ph.D is a medical doctor. Of course, he would be opposed to Dr. Clark's proctocols because it goes against everything he has been taught in medical school.
Abram Hoffer, the father of orthomolecular medicine, said it takes about 40 years before there is a paradigm shift in one's thinking on these issues. So those who believe in Dr. Clark's protocols have a long way to go before they are accepted -- if they ever are.