Refined Corn Oil (Maize Oil) is oil extracted from the Germ of Corn (Maize). Its main use is in cooking, where its high smoke point makes Refined Corn Oil a valuable frying oil. It is also a key ingredient in some margarine. Refined Corn Oil generally less expensive than most other types of vegetable oils. One bushel of corn contains 1.55 pounds of corn oil (2.8% by weight).

The issue to use corn oil as well as other vegetable oils for cooking is not just the Oxidized Cholesterol they create (which significantly increase risk for coronary heart disease), but also their very high amount of Omega–6 fatty acid, which it throws Omega–6 and Omega–3 ratio in the body out of balance. It is reported to have an Omega–6 to Omega–3 ratio of 49:1, a very far cry from the ideal 1:1 ratio.