Apparently, the collective intelligence of the human race adds up to having not so much idea really whether or not you'd eventually die of dehydration if all you ever drank was beer. (I seem to be doing OK though...) (Just kidding.) If I were in charge, we would know the answer to this question.
I seem to do best with my running if I basically do just about nothing but intervals. (No running longer than a few minutes.) Yet standard training lore does not advocate this. Emil Zatopec did back in the 50's. But supposedly we've since learned better ways since then. So either I'm a freak of nature, standard training is Still wrong, after all this time. Or... I would do better if I didn't train all intervals for months on end, year round. I suspect many people would do far better with intervals all the time. Also what a drag to deal with continous pain for 30 minutes, etc as opposed to a couple of minutes, on top of the possibility it may actually not really be the optimum way to trian. And if I were in charge we'd systematically get to the bottom of this.
It may just be that all vitamin supplements are actually bad for you. Maybe. Maybe not. After all this time, that about sums up our level of knowledge on the matter. Incredible. If I were in charge, we'd put so much more money into preventative medicine. It's 2011 and this is how little we know?