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Homing in on a single number at a time is like plugging one leak and having another spring up. The laser focus on reducing fat, for example, led to foods using more salt and sugar to compensate and that created other problems. We need a more holistic approach to diet.
The 1980s was a time of great over reporting of unfinished science. From there through the 1990s was a nonstop mood swing over what was good or bad for you.
Doesn't seem like much has changed since then.
I think you’re right, thematically. But we also know a heck of a lot more about all this than we did back then. Much more settled science compared to anecdote or conjecture.
And in the 80s they felt confident what they knew was a heck of a lot more than what was known in the 40s, probably would even have argued it was much more settled science compared to the anecdote and conjecture of yore.
Personally I am of the opinion that for all our knowledge there is still vastly more we don't know than do, and that we should always try to be mindful of possible ignorance and "of-the-time-ness" of our knowledge in all things.
You’d have been correct then too! But I do think that things are different still. In the late 1970s, medical journals went from anecdote based to evidence based publishing. That surely took time to have an effect and now research physicians are rigorous professional scientists. I’m suggesting that the base is elevated compared to then.