Jason Fung has advanced beyond his contemporaries by promoting other methodologies from high fat diets, fasting, et al. Methodologies that are counter to the conventional allopathic medicine establishment. An establishment that is still midway in the dark ages as far as actual science is concerned.
His evolution begins with an admission of being wrong. Something the rest of the institution is loathe to accept. It is interesting to note that the fitness industry knew the science way before the medical industry did. Body builders, powerlifters et al. Until now, saturated fat is evil as far as doctors are concerned, a science long debunked and yet still propagated.
Perhaps we should trust our health to fitness trainers instead.
Strange world.