Why cholesterol matters. Genes appear to play the most important role by determining how much HDL cholesterol your body makes and the proportion of different subtypes. Cholesterol is publicized as an antonym to health. As the amount of cholesterol in your blood increases, so does the risk to your health. Cholesterol circulates in the blood. High cholesterol contributes to a higher risk of cardiovascular diseases, such as heart disease and stroke. Cholesterol testing is very important if you: have a family history of high cholesterol or heart disease; are overweight or obese; drink alcohol frequently However, it is a necessary nutrient for body function. Lower cholesterol and blood pressure target levels may help adults with type 2 diabetes to prevent or even reverse hardening of their arteries, according to new research. The Importance of Lowering Cholesterol. Learn more about how health systems can address stroke risk factors and improve the quality of stroke care to reduce stroke deaths. What causes low HDL cholesterol? Bad cholesterol, LDL, often deposits cholesterol in blood vessels. Lifestyle choices also affect HDL levels. Controlling your blood pressure, managing cholesterol and diabetes, and quitting smoking are important steps to reducing your risk. That’s why it’s important to have your cholesterol tested, so you can know your levels. There are many reasons why some people have low HDL and others have high HDL. Diet plays an important role in determining your cholesterol levels Regular exercise can help in regulating cholesterol levels The heart is an essential organ of the human body. Cholesterol is a soft, waxy, fat-like substance found in your body’s cells and bloodstream. An estimated 21 million Americans have diabetes and 284,000 die from it each year, with 65% percent of these deaths related to cardiovascular causes. This is because cholesterol production in the body an extremely complex process, and places burden on the liver ( 2 ). "Cholesterol is important for cell function," says Prediman K. Shah, MD, director of the Oppenheimer Atherosclerosis Research Center and Atherosclerosis Prevention … Much of the needed cholesterol is obtained through foods such as meat and dairy, but it can also be made by the liver. Cholesterol is found in the structure of all cells in the body. If your risk is very low, you probably won't need a statin, unless your LDL is above 190 mg/dL (4.92 mmol/L). So the cholesterol present in HDL is, to a large extent, excess cholesterol that has just been removed from cells and blood vessel walls and is being transported back to the liver for recycling. Although our bodies are capable of producing so much cholesterol on its own, it is still very important to obtain cholesterol from dietary sources. 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