Divemedic has a good post regarding how science is supposed to work. It makes you wonder what physicians are recommending now that will be in the dustbin of history 25 or 30 years from now.
Like thalidomide, frontal lobotomies, margarine is healthier than butter, ulcers are caused by stress and spicy food.
A snippet:
A scientific law or theory is only valid until some other set of facts proves it to be incorrect in some or all situations, then the law or theory has to be modified, or perhaps even scrapped altogether. Scientific laws and theories are never considered absolute, eternal truths. They are the best current explanations/models that fit the available evidence, and they remain open to revision or replacement when new, contradictory evidence emerges.
—–Steve Parker, M.D.
Advanced Mediterranean Diet 