Low-density lipoproteins (LDL) are a type of cholesterol found in the blood. They are often referred to as "bad" cholesterol because high levels of LDL can lead to the buildup of plaque in the arteries, increasing the risk of heart disease and stroke. LDL carries cholesterol from the liver to the cells, but when there is too much, it can accumulate in the artery walls. Monitoring LDL levels is important for maintaining cardiovascular health. A healthy lifestyle, including a balanced diet and regular exercise, can help manage LDL levels. In some cases, medications may be prescribed to lower LDL and reduce the risk of related health issues, such as heart disease and atherosclerosis.