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Not familiar with PUFA (had to look it up). I am a little confused by what your last line is saying?

PUFA: Polyunsaturated fatty acids are fatty acids that contain more than one double bond in their backbone

The types of fats in grain fed and grass fed meat are different, that is what I was saying.

By "carnivores" I mean people who only eat meat: they are all taking the stance that "saturated fat good, PUFA bad".