Corn oil is derived from the germ of the corn plant, one of the most widely grown and relied on crops in the world. Due to this huge availability, it might be one of the most inexpensive vegetable oils, and thus one of the most popular. Corn oil can be acquired through an extended process of expeller pressing, refinement, and steam distillation. While this creates an oil that may have a very high smoke point, making it ideal for cooking purposes, it can also saps many of the beneficial compounds from the oil, in which case, there may be few health benefits.