Sunflower oil is pressed from the seeds of the sunflower. The oil is used as medicine.Sunflower oil is used for constipation and lowering "bad" LDL cholesterol.Some people apply sunflower oil directly to the skin for poorly healing wounds, skin injuries, psoriasis, and arthritis; and as a massage oil.In foods, sunflower oil is used as a cooking oil.How does it work?Sunflower oil is used as a source of unsaturated fat in the diet to replace saturated fats.