By any chance, do you have a book reference that discusses that change?
I’ve been thinking about it a little, and about the rather basic level of medicine that I received when I was a child. It wasn’t exactly “nature based herbal medicine” but it was clearly based on that sort of tradition. But today, it’s all fancy chemicals from enormous conglomerates and I suppose some would say it’s now “better” but I’m not sure that I agree it’s truly “better”. I’m trying to do a little research into how we got here.
One change in the American diet is the introduction of seed oils in the 20th century. The highest source of omega 6 fats are seed oils. The percentage of fat in people’s bodies that is omega 6 fats keeps increasing, so that change in diet is still having effects.
Many experiments found that omega 6 fats increase weight and cause cancer.
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Foods contain more vitamin a than we need.
Milk sellers threatened by the government add vitamin a to skim milk.
Found this, tends to agree with prior FR research.
https://truth11.com/2020/11/23/the-rockefeller-drug-empire-since-1913/