Earlier quoted context omitted.
We have a set of reflexive attitudes about food that are largely uncorrelated with health, nutrition or the environment, but are strongly correlated with the social class of who eats what. I wish this point was brought up more in nutrition discussions. Most of these recent fad diets like keto, paleo, and carnivore are beyond the means of most people in the world. So even if we accept, for the sake of argument (which…
keto a fad diet? It's been around since the 1920s...
All kinds of non-diet fads come and go too, even bellbottoms made a couple of comebacks in the decades since the late 60s.