Low Density Lipoprotein (LDL) is often called bad cholesterol because it is the main reason that causes various heart diseases. LDL is the smallest, dense lipoprotein that tends to deposit blood cholesterol on the walls of the arteries while transporting it from the liver. When the blood LDL levels are high, it starts forming clots (plaques) in the blood vessels. With continued deposition of cholesterol, the plaque thickens and causes narrowing of blood vessels. This increases the risk of hypertension (high BP), angina (chest pain), heart attacks, strokes and peripheral vascular diseases. 100 mg/dL of LDL is considered as an optimal level that has shown to improve heart health. If you have LDL levels between 130-159 mg/dL, then you are considered to be at the borderline and may need cholesterol lowering drugs to prevent the risk of heart diseases. In this section, you can find answers to all your common queries regarding cholesterol and lipid profile. You can also look at dietary changes you can make to lower your cholesterol levels. which include some natural foods like garlic, watermelon and oats.