From: "Alex Shvartsman" > So all vegetable oils other than olive and Canola are > polyosaturated?:Sunflower, walnut, corn etc...? Yes. Simply check the label. They are more polyunsaturated than saturated or monounsaturated. The only fat that is stable against rancidity is saturated. There is a great book about fats written by someone by the name Enig(sp). Someone else in the group will know the book. Another thing that I do that others may do is when I open a bottle of olive oil I squirt a capsule of vitamin E into the bottle to prevent excessive oxidation. For what it's worth! Jeff