Dietitians surveyed by Health publication have identified extra-virgin olive oil as the best choice for daily low and medium heat cooking.
While common cooking oils contain similar calorie and fat levels, experts emphasize that smoke point determines which oil is safest to heat.
Most vegetable oils, including olive, sunflower, canola, and peanut oil, offer nearly identical basic nutrition. Each tablespoon contains approximately 120 to 125 calories and 14 grams of fat.
However, the smoke point represents the critical temperature limit where oil begins to burn and release harmful compounds. A study published in the journal Acta Scientific Nutritional Health found that prolonged heating above an oil's smoke point alters its physical and chemical composition, posing potential health risks.
New York nutritionist Maddie Pasquariello explained that selecting a cooking oil depends on specific culinary goals. She noted that choices vary based on whether food is prepared over high heat, low heat, or used uncooked in dressings and sauces.
Health Benefits of Olive Oil
Unrefined extra-virgin olive oil boasts higher quality and more beneficial compounds than refined olive oil varieties. Its smoke point ranges between 350 and 410 degrees Fahrenheit, making it ideal for daily stewing and medium-heat frying.
Sports and media dietitian Tayyiba Mughal highlighted the cardiovascular advantages of extra-virgin olive oil. She said the oil is valuable for its balance of fatty acids and high concentration of polyphenols, which support heart health and metabolic processes.
Polyphenols are naturally occurring plant compounds known for their strong anti-inflammatory and antioxidant properties. Research published in the Journal of Molecular Sciences confirmed these therapeutic attributes in olive oil polyphenols.
In addition, olive oil is rich in monounsaturated fats that protect blood vessels against atherosclerosis, a medical condition involving arterial plaque buildup. Lowering blood pressure and reducing overall cholesterol, a single tablespoon of extra-virgin olive oil provides about 20 percent of the daily recommended intake of vitamin E.
Mughal added that oleic acid in extra-virgin olive oil consistently lowers bad low-density lipoprotein cholesterol levels. Replacing saturated fats such as butter, lard, or tropical coconut and palm oils with olive oil significantly reduces the risk of cardiovascular disease.
High-Heat Frying and Avocado Oil
Dietitian Jennifer House drew attention to avocado oil as the top candidate for high-heat cooking. Avocado oil features a much higher smoke point, reaching between 482 and 520 degrees Fahrenheit depending on its level of refinement.
House stated that avocado oil's elevated smoke point allows cooks to add it to high-temperature dishes and baked goods without burning. Its neutral taste ensures that the natural flavor of the food remains uncompromised.
Consequently, health experts recommend avocado oil for high-heat frying, while reserving olive oil for marinades, dressings, and sauces. Professor Jacqueline Vernarelli of Sacred Heart University in Connecticut recommended using extra-virgin olive oil primarily in cold dishes to preserve its fragile nutrients.
Thermal exposure significantly degrades the nutritional profile of olive oil. Research indicates that heating olive oil to 248 degrees Fahrenheit destroys approximately 40 percent of its beneficial compounds within 15 to 60 minutes, while temperatures of 338 degrees Fahrenheit eliminate up to 75 percent.
Despite these heat-induced losses, researchers writing in Comprehensive Reviews in Food Science noted that extra-virgin olive oil remains more resistant to oxidation during frying than many refined oils.
