“Since it is derived from olive berries, it contains large amounts of antioxidants, phytosterols, and vitamins1,” registered dietitian Titilayo Ayanwola, MPH, R.D., L.D., tells mbg. “It is notably rich in vitamin E, a fat-soluble antioxidant that helps to maintain the integrity of cell membranes and protect it from damage by harmful free radicals,” she adds. Studies show the monounsaturated fats in extra-virgin olive oil can reduce bad cholesterol2, making it a heart-healthy oil. The quality of the oil depends on the avocado’s origin and extraction methods, so make sure to check for unrefined oil. It also tends to be on the expensive side.