[rwh86]

There is an excellent book written by a science journalist who spent 10 years doing a deep dive on the best available scientific evidence surrounding dietary fats. It explains why it is so difficult to find high-quality evidence for anything in nutrition science and, having been written by a journalist, it also does a decent job of investigating the history and politics that have coloured diet advice over the last century or so.

https://thebigfatsurprise.com

She has also done a TED talk that gives a very quick summary of the book:

https://www.youtube.com/watch?v=1CHGiid6N9Q

[tuukkah]

I'd rather not believe the picture painted by one book author as opposed to Wikipedia and "World Health Organization,[1] the Food and Nutrition Board of the National Academy of Medicine,[2] the American Dietetic Association,[3] the Dietitians of Canada,[3] the British Dietetic Association,[4] American Heart Association,[5] the British Heart Foundation,[6] the Heart and Stroke Foundation of Canada,[7] the World Heart Federation,[8] the British National Health Service,[9] the United States Food and Drug Administration,[10] and the European Food Safety Authority.[11]" https://en.m.wikipedia.org/wiki/Saturated_fat_and_cardiovasc...

[rwh86]

Have you read the book?

That Wikipedia article doesn't really support your contention that vegetable oils are healthy and animal fats are unhealthy. That is, at the very least, a gross simplification. In my opinion, the research is not yet good enough to draw any such definitive conclusion.

Vegetable oils have been a large part of the human diet for less than 100 years, but have been progressively increasingly consumed by western populations, especially in the U.S. In that time overall cardiovascular health has trended in what direction?

Anyway, this might all be a sideshow to the general reduction in calories being derived from fat in general. The replacement of calories from fat with calories from carbohydrates seems particularly harmful when taken to an extreme, especially for women.

But, again, my main contention is that the evidence is at best preliminary, based on observational studies which cannot show cause and effect, and often poorly controlled and based on small numbers of participants. The largest, best controlled studies often don't support the mainstream view. It's simply not scientifically settled.

[jiggunjer]

Read journals from scientists... instead of science from journalists.

[hn_throwaway_99]

For what it's worth, as someone who grew up in the 80s and 90s when the mainstream nutrition advice, supported by many of the organizations you've listed, was "eat lots of bread and pasta!" and "Fat is bad for you!" and "Stay away from eggs!", I'm more interested in what the actual underlying studies say, and how they were conducted, than any summarized "advice" coming from these organizations.