polyunsaturated fat

The low-fat craze has ebbed somewhat in recent years as other nutrients -- primarily carbohydrates and, in particular, sugars -- have become the new villains of the diet scene. But many foods are still marketed with the claim that they are "fat free" or "low fat."
Never-published data on vegetable oil and heart health reveals some disturbing trends.
Do we know everything there is to know about how omega-6 fats affect our health? Of course not. But is the notion of an optimal ratio of omega-6 to omega-3 a myth with absolutely no data to support it? Hardly.