Cottonseed oil is not required to be as fully hydrogenated for many purposes as some of the more polyunsaturated oils.

This is supplemented by two to eight tablespoons of polyunsaturated oil to cut the absorption of toxins in the intestine and promote their excretion.

All polyunsaturated oils have the same number of calories - 120 per tablespoon - but they vary in their saturation levels.

Heart disease has been correlated most consistently with consumption of sugar and an excess in polyunsaturated oils.

All polyunsaturated oil undergoes a process of rancidity once exposed to oxygen in the air.

The dietary advice differed between the trials reviewed, but most prescribed a reduced saturated fat and cholesterol intake with partial replacement by polyunsaturated oils.

One, when asked last week about the differences between polyunsaturated oils like corn, safflower and canola, could not provide concrete answers.

Several scientific studies suggest that ingesting large quantitites of polyunsaturated oils causes cancer in test animals.

Either polyunsaturated oils, like safflower oil, or monounsaturated oil, like olive oil, will work.

Other monounsaturated oils keep well up to eight months, while unrefined polyunsaturated oils will keep only about half as long.