If sunflower oil is used wisely, it can be healthier than other oils. Hydrogenated sunflower oils should be avoided, as they can be high in saturated fats, which are associated with a number of health issues and can lead to a higher risk of cancer and heart problems.
Look for a non-hydrogenated sunflower oil that is high in oleic acid as a healthy choice. Even then, intake should be limited. Sunflower oil is very high in fat. Not all fat is bad, but, according to the America Heart Association, most people ingest more fat each day than their bodies need.