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Except everyone is still scared to death of saturated fat, which may actually have unique satiety mechanisms (see video below for a dive into saturated fat and reverse electron transport). There's some questions about the Ancel Keys studies that lead to the demonization of saturated fat as well.

https://www.youtube.com/watch?v=pIRurLnQ8oo

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I'm sorry but the Keto family of diets has been the mainstream mantra for the last decade.

It also fails so many people because the supposed satiety mechanism only seems to work shorttime for most practitioners.

Most, if not nearly all, fail to match satiety in line with reduced caloric need as they go through the initial weight-loss phase. Even worse, most experience a habituatiuon and start increasing the amount of (low-carb/high fat) energy intake, negating the initial benefits and reverting to a state of over-consumption and stored energy surplus.

Mainstream keto does not seek to avoid polyunsaturated fat, which we've been taught is heart healthy. This theory isn't keto, it's rather that the society wide switch away from saturated fat to polyunsaturated fat has disrupted satiety mechanisms. Some people are even examining these ideas with adequate carbs, example search term: "the croissant diet".

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