Comment by olau

"On the other hand, a true low fat diet, with fewer than 10% of calories from fat, has been shown to actually reverse the progression of heart disease"

I know almost nothing about health studies, but I read the abstract you link to and there's no mention of randomized control group or other mechanism to prevent bias.

Tried a quick search and came up with this Wikipedia article:

https://en.wikipedia.org/wiki/Saturated_fat_and_cardiovascul...