Is it the doctor's job to stay up to date on studies? Yes. No, no, it isn't. Even if some of the doctors are right, and presumably some are because they're all over the place, how could you possibly tell which ones are right? See the problem? It's the same problem with the financial industry. There are 10,000 stocks, if you could choose. But there are probably 100,000 financial advisors. What's harder? Picking a good stock or picking the right financial advisor? It's actually easier without the financial advisor, because they just add another thing that can go wrong, and they charge you for it.