Cholesterol is a waxy substance that is found in every cell of the body. It is an essential substance for the proper functioning of the body, but excess levels can lead to serious health problems such as heart disease and stroke.

Cholesterol is primarily produced by the liver and is transported throughout the body in the blood. There are two types of cholesterol: "good" cholesterol (HDL) and "bad" cholesterol (LDL). HDL cholesterol is considered good because it helps remove LDL cholesterol from the blood, while LDL cholesterol is considered bad because it can build up in the arteries, leading to blockages and increasing the risk of heart disease.

In the healthcare industry, cholesterol levels are frequently monitored as part of routine physical exams or to assess the risk of heart disease. High levels of LDL cholesterol can be addressed through lifestyle changes such as diet and exercise and, in some cases, medication. Statins are commonly prescribed to lower LDL cholesterol levels and reduce the risk of heart disease. Additionally, cholesterol-lowering medications called PCSK9 inhibitors are also available as an alternative to statins.

Overall, monitoring cholesterol levels and maintaining healthy levels is an important aspect of disease prevention and management, especially in individuals at risk for cardiovascular disease.