There are different kinds of fats, they do different kinds of things in the body and we need to understand them. We can’t just think that all fats are bad or good, there’s a grading system involved.
BEST: Omega 3’s are awesome fish oils, but obviously not good for frying due to the fishy smell and taste. Best omega 3s include wild fish, flax seeds, and walnuts.
GREAT: Olive oil is top-notch. It’s monounsaturated, it goes to your liver and helps it work better. It’s a great oil. Avocado oil is great. Sesame oil is great.
GOOD: Canola oil has some omega 3s, but it has way more omega 6s (ratio 31:69) which isn’t ideal.
FINE: Butter is saturated fat. Everybody thinks that butter is bad because that’s what they’ve been told. We thought saturated fat was the cause of heart disease. Saturated fat is not good for you, but it’s not bad for you. It’s about neutral. Butter is probably better for grilling, sautéing, etc than many others. Butter is just fine.
NOT OK: Some other oils are not as great as they are too high in omega 6. These include corn oil and soybean oil. Palm oil is a medium-chain triglyceride and metabolized in your liver in a completely different way.
BAD: Omega 6 oils, farmed fish (due to being corn fed), corn fed meat.
WORST: The ultimate disaster is, of course, trans fats. Stay far away from any ingredients that include the words “hydrogenated” or “partially hydrogenated”. Trans fats are a consumable poison.