I tend to believe this research.
https://drcate.com/list-of-good-fats-and-oils-versus-bad/
But do your own due diligence.
Any oil/fat that is "processed" has been made dangerous.
Nutritional "wisdom" that told us to select polyunsaturated vegetable oils (remember the salad bar craze?), and that animal fats are bad for your heart, is wrong.
The polyunsaturated oils have double bonds which are unstable and when they break, whatever cell membrane incorporated them becomes damaged.
Animal fats on the other hand are the kind of fats that are NORMAL within mammalian bodies.
Also learn the difference between Omega-3 and Omega-6 fats. Concentrated animal feeding operations – the kind that have been used since the 1930s to fatten beef cattle – feed the steers grains, which convert to Omega-3 fats instead of the Omega-6 fats that pastured animals feature moar of.
Much to learn here to upend the incorrect teaching that has been foisted on us for 40 years by the medical establishment.