Medical therapies should be based upon science. That is a recurrent theme, indeed, the major theme, of this blog. Based on that simple thesis, I've spent the last decade examining "unconventional" treatments and evaluating the scientific basis (or, much more usually, the lack of a scientific basis) for various treatments. Yes, I've looked at other issues, including general skeptical issues, the occasional political rant, Holocaust denial, and, of course the odd self-indulgent bit of twaddle that every blogger engages in every now and then, but I always come back to the question of the…