it may well be with food as Max Planck said about science. he said "A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it."

it would be a sad thing for so many people to be killed by their mistaken beliefs. it may be that all we can do is take care of ourselves and talk to anyone who will listen, but how much evidence should be needed when half the population of the developed world is set to develop diabetes and/or cancer in their lifetime?