Terry - Now that I know just how damaging polyunsaturated fats are, I avoid them like the plague. Could I tell if someone grilled a steak in some? Not likely, but then I generally grill my own steaks. Like you, my preference is for Coconut oil, butter, and olive oil.
Why are PUSF’s are so dangerous to eat? Especially when we’ve been told to cook with and eat Crisco, Soybean oil, Corn oil, Canola oil, “Vegetable oil,” Margarine? They’re chemically unstable, and are easily oxidized.
Oxidized fats are dangerous because they’re inflammatory, and inflammation contributes to just about every chronic disease you could name, including heavy-hitters like obesity and diabetes, not to mention hypertension and liver damage.