Cholesterol levels refer to the amount of cholesterol present in the blood, which is a fatty substance essential for various bodily functions. Cholesterol is carried in the bloodstream by lipoproteins, primarily LDL (low-density lipoprotein) and HDL (high-density lipoprotein). High levels of LDL cholesterol can lead to plaque buildup in arteries, increasing the risk of heart disease and stroke, while HDL cholesterol helps remove excess cholesterol from the bloodstream. Monitoring cholesterol levels is important for maintaining heart health. A healthcare provider typically measures cholesterol levels through a blood test, which can help determine an individual's risk for cardiovascular issues. Maintaining a balanced diet, regular exercise, and avoiding tobacco can help manage cholesterol levels effectively.