What Are Edible Oils? | The Everyday Cooking Essentials

Walk down any grocery aisle and you will see them everywhere — bottles of olive oil, jugs of canola, jars of coconut. They are the workhorses of most kitchens, used for everything from a quick sauté to a deep batch of fried chicken. U.S. federal regulation in the Code of Federal Regulations gives a broad legal definition, calling edible fats and oils all edible fats from plants or animals, whether commonly consumed or not, and including oils made by hydrogenating oils or liquefying fats. Simply put, they are food-grade fats that make cooking possible.

The real question for most home cooks isn’t just what they are, but which one to use and when. The short answer to that comes down to one practical spec: smoke point.

How Edible Oils Are Made

Most edible oils don’t come out of the plant ready to pour. They go through steps to become the clear, stable products you buy. Seeds like sunflower and canola are pressed or chemically extracted to pull out their oil, then refined to remove impurities and extend shelf life. That processing matters more than most people realize, because it directly changes how the oil behaves in the pan.

Olive oil is the notable exception. Extra-virgin olive oil is pressed from olives without heavy refining, which means it keeps more flavor but also has a lower tolerance for high heat. The more processed an oil is, the higher its smoke point tends to be.

Why Smoke Point Matters

Smoke point is the temperature at which an oil starts to visibly smoke and break down. When oil reaches that point, it stops being good to eat.

Heating oil past its smoke point creates visible smoke and chemical breakdown, and the oxidation can form compounds that may increase health risks. The point isn’t a fixed property per se, but a practical guide. The industry chart of typical values — based on single tests per source, not an average — gives useful real-world numbers for common oils:

These values are typical, not universal. An oil’s actual performance varies with its refinement and free fatty acid content, and the chart’s samples were tested after deodorization at 0.05% or less. The takeaway: match the oil to the heat.

Health Considerations and Oleic Acid

Beyond cooking performance, the type of fat matters for health. Many common edible oils — olive, sunflower, canola — are rich in oleic acid, a monounsaturated fat. The FDA has completed its review of a qualified health claim stating that consuming oleic acid in edible oils may reduce the risk of coronary heart disease, based on credible evidence. That’s why olive oil in particular gets so much attention as a heart-healthy choice.

Not all oils are equal here. Coconut oil, for instance, is high in saturated fat and has a lower smoke point, making it a poor choice for high-heat frying but still useful for baking and flavor. The best approach is to keep a couple of oils on hand: a neutral high-smoke-point one like canola for frying, and a flavorful one like extra-virgin olive for finishing and low-heat cooking. If you are deciding which edible oils are worth adding to your pantry, our roundup of the best edible oils breaks down the top picks side by side.

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