There are two types of cholesterol - LDL and HDL. HDL stands for high-density lipoprotein, and if you have more of it, you are at a lower risk of heart attack and stroke. LDL stands for low-density lipoprotein and raises your risk for heart disease. Saturated fat from fried foods is the most common source of LDL cholesterol. Foods like salmon or avocado can help increase your levels of HDL.