I came across this video about why we should stop eating processed vegetable and seed oils:

The $100 Billion Dollar Ingredient making your Food Toxic - YouTube

The problem with these Polyunsaturated fats is Oxidation. They easily oxidize after being pressed which makes them unstable and toxic. High heat from cooking and deep fryers causes further oxidation. All that oxidation is destructive to our cells and causes inflammation and premature aging which is bad for our brain.

But the good news is that we can easily improve our diets and health simply by replacing the toxic Vegetable and Seed Oils with healthy Saturated Fats.

Avoid cooking with or consuming
these fats and oils:
Canola
Corn
Cottonseed
Grapeseed
Hydrogenated Oils
Margarine
Partially Hydrogenated Oils
Peanut Oil
Rapeseed
Rice Bran
Safflower
Soybean
Sunflower
Trans fats
Vegetable Oil
Vegetable Shortening
Wheat Germ Oil