Cholesterol
Corn oil is an effective component in lowering blood cholesterol levels. Corn oil offers
high levels of polyunsaturated instead of saturated fats. Polyunsaturated fats lower blood
cholesterol levels. Monounsaturated fats neither lower nor raise blood cholesterol levels.
Saturated fats are approximately twice as powerful in raising cholesterol levels as
polyunsaturated fats are in lowering them. Corn oil contains about 60 percent
polyunsaturated, 25 to 30 percent monounsaturated and 10 to 15 percent saturated fats.
In fact, the Food and Drug Administration has acknowledged the unsaturated fat benefits of corn oil in reducing the risk of heart disease. See the FDA's letter to ACH Food Companies, Inc. regarding qualified health claims.
Research has shown that phytosterols play an important role in reducing blood cholesterol
by inhibiting its absorption from the intestines. According to the U.S. Department of
Agriculture, corn oil contains 968 milligrams of phytosterols per 100 grams of oil. It has
one of the highest phytosterol levels of the refined vegetable oils. Only rice-bran oil has
a higher phytosterol content at 1,190 mg/100 grams. Corn oil is the only product that
contains a natural mixture of free phytosterol, phytosterol esters and phytostanol esters.
Blood Pressure
Numerous human studies show that diets enriched in polyunsaturated fatty acids can
significantly lower elevated blood pressure in individuals with high blood pressure. Corn oil
was used in many of these studies. Corn oil diets have shown blood pressure lowering of
about 12 percent in men and 5 percent in women who had elevated blood pressure (mild
hypertension). No significant effect of polyunsaturates has been noted in persons with normal
blood pressure.
Essential Fatty Acids
Corn oil is a rich source of linoleic acid, which is one of two essential acids necessary for
growth and good skin and hair quality. Linoleic acid is labeled “essential” because it cannot
be synthesized by the body and must be supplied in the diet.
Tocopherols
Corn oil is also recognized as an excellent source of tocopherols. Tocopherols function as
antioxidants and provide a good source of Vitamin E. The antioxidant activity of tocopherols
is important in health terms, but also in terms of quality of the product because it helps
retard development of rancidity.
The four major tocopherols found in corn oil are alpha-tocopherol, beta-tocopherol, gammatocopherol
and delta-tocopherol. In commercially available corn oil, gamma-tocopherol is
most abundant, followed by alpha-tocopherol and delta-tocopherol. The tocopherol that
exhibits the greatest antioxidant effect is delta-tocopherol and alpha-tocopherol has the
highest vitamin E activity.
