What is the difference between “good fat” and “bad fat”?

So I know that saturated & trans fat are the worst, but please help us understand this: if someone has unsalted nuts which the says “15g fat [2g saturated, 0 trans], then what about the other 13g fat??? What exactly is that? And where does it come from? Also, is that normal for nuts?? (Cashews, almonds, pistachios, and pecans). An explanation on this would be highly appreciated!! TIA!

Answer

Good - insaturated - like olive oil, fish oil, peanut oil, and other vegetable oil

Bad - saturated - lard, schmaltz, animal fat, margarine, hydrogenated vegetable fat, hydrogenated vegetable fat, hydrogenated palm oil, basically any and all industrial fats (vegetable creams)

Answer

This is a comment I wrote for another post but hopefully the information helps you for this post!

Palm oil, sunflower oil and coconut oil are saturated oils. The amino acid chains of saturated oils are different than unsaturated (unsaturated oils are olive oil, avocado oil etc) and because of the difference of the amino acid chain, they either allow our cells to be flexible (unsaturated) as they should be, or they make our cells rigid (saturated) due to the formation of their amino acid chain structure.

This is an article I found that explains things well and there are probably lots more studies and articles on pubmed, google scholar, etc.

https://www.sciencedaily.com/releases/2017/12/171201181545.htm