Groundnuts, more commonly known as peanuts, are a legume that can be processed into an oil. Groundnut oil is made by pressing harvested groundnuts, which are rich in fat -- containing 40 to 50 percent fat. Like other plant-based oils, groundnut oil contains no cholesterol.

Not all fats are bad for you. While you should limit saturated and trans fats, the unsaturated fats -- including the polyunsaturated omega-3 and omega-6 fats and the monounsaturated fats, or omega-9 fats -- are healthy in moderation.