Vitamins were once regarded as a waste of money until it was proven otherwise. The same goes for Hypnosis (generaly thought to be a sham until it was used in hospitals and documented in Medical Journals). Same goes for mercury filings, lead in gasoline, cancer and cigarettes, toxic office environments, radiation from CRTs on pregnant women... The list goes on. Most people have a mortal fear of being different from the crowd or be seen as "deviant". You'll find the public in general will be sceptical about something right up to the point that someone in a leadership position or a famous person says otherwise; even if all the facts are clearly laid out in front of them.
It always takes an intrepid few to blaze the trail so the rest can follow!
