A bit more to add: This is something I have followed for a long time, and as far as I can tell it's well supported by evidence, and not really controversial. T

A bit more to add: This is something I have followed for a long time, and as far as I can tell it's well supported by evidence, and not really controversial. There's even a good understanding of the biological processes involved including oxidative damage to lipids in arteries, excessive production of inflammatory prostaglandins, and NAFLD (non-alcoholic fatty liver disease) progression. As far as I can tell it has had poor adoption and limited spread until recently for three main reasons. First, it's complex compared to most nutritional ideas, and requires at least understanding that there are a lot of different types of fatty acids, and they can have distinct biological and nutritional properties, even different ones that are often grouped together with similar names. Second, on the surface it conflicts with the (now increasingly unpopular) idea that saturated fat was particularly harmful. Third, it's extremely cheap, and widely marketed as a health food.