But the point is; Doctors are recommending and using them now in spite of incomplete research on them. You seem to have a wrong idea of "Scientific Method" (ht

But the point is; Doctors are recommending and using them now in spite of incomplete research on them. You seem to have a wrong idea of "Scientific Method" (https://en.wikipedia.org/wiki/Scientific_method https://en.wikipedia.org/wiki/Scientific_method) and how policies are actually enacted based on incomplete knowledge/research.