Astonished how many pretend a topic so complicated by biology/genetics and routinely proven wrong can be easily broken down into simplistic good/bad buckets (and of course they definitely got it right this time)
Saturated fats and salt are next in line to fall, despite how hard the entrenched old guard of health authorities want to ignore the new evidence.
Ironically the man behind the campaign against protein was called Dr Kellogs and you can guess which company he founded.
There's a great documentary called In Defence of Food. Check it out.
Western lifestyles are relatively sedentary, yet our brains are consuming more information than ever. Mental processes have nutritional needs and we're stabbing in the dark as to how to approach this problem. People have not figured out the best regimen for this new lifestyle.
Like psychology. And I'm sure there are many other examples.
There is so much of this in nutrition because there is profit motive via the food industry.
The thing about nutritional science is that progress seems like it's just not being made at all. We go from fad to fad.