Compared to some other oils, cottonseed oil is low in heart-healthy monounsaturated fat. A 1 tbsp. serving contains just 2.4 g, compared to 10 g in the same quantity of olive oil. Monounsaturated fat decreases risk of heart disease, as it increases levels of “good” high-density lipoprotein cholesterol and decreases levels of “bad” low-density lipoprotein. To maintain a healthy heart, select oils that are high in monounsaturated fat, such as sunflower, safflower or canola.