Yes, they would take their references from standard sources.
I learned in my Karate days not to "appeal to authority", this is how I achieved the British championship. I know the stuff coming out of Oxford (UK) and Harvard is garbage, National Geographic are just another name, with humans behind it, now get me some superior aliens and I will accept if shown, their authority; at this stage I will not listen to non low carb Doctor, Dietition, etc for example, I would rather trust for my health a £15.00 blood glucose monitor, would I be wrong after almost 5 years of study and real world testing.
I have a reference on this site where I said I wanted to do less meat, this is how easy it is to believe everything out there (needless to say this is no longer my thought).
Here's a common sense example, before getting Type 2, I was an Omnivore, so meat and fish was in my diet, now I eat more meat and my Type 2 is reversed and my biomarkers are improved, - this is true of over 90% approximately of reversed Type 2's who at the least continue to eat meat, have you seen the biomarkers of those who take part in Carnivore Corner, some have HbA1cs of 29 to low 30's, low crp and insulin. Another common sense observation when I was growing up hardly anyone was fat / overweight (perhaps a Gran or Grandad), meat and dairy were pre-dominant, I can even remember getting milk at school everyday - those days liver and bacon, steak and kidney pie, home cooking mainly, cheap meat cuts / stews, beef dripping, lard. I talk to my Father In Law and know the truth about the foods of his childhood, I know my wifes Grandad used to get a single Orange for Christmas as a treat.
I can't recall the name of the trial but when vegetarians and meat eaters who shop at whole food stores are compared, there are no differences between predicted outcomes.
The same so called accepted facts are why statins are mainstream, low fat high carb fruit and veg is great (I believe low GI are alright).
This is a kicker that is still a fact:
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So still chronic and progressive, should I believe this or my avatar.