100% Pure Corn Oil Corn oil is a cholesterol free food with 14g of total fat per serving. Very limited and preliminary scientific evidence suggests that eating about 1 tbsp (16 grams) of corn oil daily may reduce the risk of heart disease due to the unsaturated fat content in corn oil. FDA concludes there is little scientific evidence supporting this claim. To achieve this possible benefit corn oil is to replace a similar amount of saturated fat and not increase the total number of calories you eat in a day.