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Cholesterol is a fat-like, waxy substance that can be found in all parts of your body. It helps your body make cell membranes, many hormones, and vitamin D. The cholesterol in your blood comes from two sources: the foods you eat and your liver. But your liver makes all the cholesterol your body needs.
Cholesterol and other fats are carried in your bloodstream as spherical particles called lipoproteins. The two most commonly known lipoproteins are low-density lipoproteins (LDL) and high-density lipoproteins (HDL).
What is LDL (low-density lipoprotein) cholesterol?
What is HDL (high-density lipoprotein) cholesterol?
LDL ('bad")cholesterol is a type of fat in the blood that contains the most cholesterol. It can contribute to the formation of plaque buildup in the arteries (atherosclerosis). This is linked to higher risk for heart attack and stroke.
You want your LDL to be low. To help lower it:
Avoid foods high in saturated fat, dietary cholesterol, and extra calories
Maintain a healthy weight
HDL ("good")cholesterol, helps to remove cholesterol from the blood. This keeps plaque from building up in your arteries.
You want your HDL to be as high as possible. Some people can raise HDL by:
Exercising for at least 30 minutes 5 times a week
Not eating saturated fats
Others may need medicine. Because raising HDL is complicated, you should work with your healthcare provider on a treatment plan.
A cholesterol screening is an overall look at the fats in your blood. Screenings help find people at risk for heart disease. It is important to have what is called a full lipid profile to show the actual levels of each type of fat in your blood: LDL, HDL, triglycerides, and others. Talk with your healthcare provider about when to have this test.
High blood cholesterol is a significant risk factor for heart disease and stroke. You can lower your risk by getting more exercise, losing weight if you are overweight, quitting smoking, and eating a healthy diet. But blood cholesterol is very specific to each person. For that reason, a full lipid profile is an important part of your health history and important information for your healthcare provider to have. In general, healthy levels are:
LDL—less than 100 milligrams per deciliter (mg/dl) is considered best
HDL—greater than 40 milligrams per deciliter (mg/dl) for men and greater than 50 milligrams per deciliter (mg/dl) for women
A total cholesterol level below 200 mg/dl is considered best
Your healthcare provider may decide that your LDL cholesterol level should be kept lower than 130. This may be if you already have coronary artery disease (CAD) or have an increased number of risk factors for CAD. Recent studies have shown that those who are at highest risk for a heart attack should lower their LDL cholesterol level to less than 100. An LDL cholesterol level of 70 or less may be best if you are at the very highest level of risk. Always talk with your healthcare provider for a diagnosis.
Medical treatment may include:
Changing risk factors. Some risk factors that can be changed include lack of exercise and poor eating habits.
Cholesterol-lowering medicines. Medicines are used to lower fats in the blood, particularly LDL cholesterol. Statins are a group of medicines that can do this. They include simvastatin, atorvastatin, and pravastatin. Two other types of medicines that lower cholesterol levels are bile acid sequestrants such as colesevelam, cholestyramine, and colestipol, and nicotinic acid (niacin).
High cholesterol is a risk for many Americans. Consider these statistics:
According to the American Heart Association (AHA), about 99 million American adults have total blood cholesterol levels of 200mg/dl and higher. Of those, about 32 million American adults have a level of 240 or above.
High cholesterol levels early in life may play a role in developing atherosclerosis as an adult.
According to the AHA, high blood cholesterol that runs in families will affect the future of an unknown but probably large number of children.
Triglycerides are another class of fat found in the bloodstream. The bulk of your body's fat tissue is in the form of triglycerides.
The link between triglycerides and heart disease is being studied. But many people with high triglycerides also have other risk factors, like high LDL levels or low HDL levels.
A healthy triglyceride level is less than 150 mg/dl. High triglyceride levels may be caused by health conditions like diabetes, hypothyroidism, kidney disease, or liver disease. Dietary causes of high triglyceride levels may include drinking a lot of alcohol, and eating foods containing cholesterol, saturated fat, and trans fat.
Bayhealth is Southern Delaware’s healthcare leader with hospitals in Dover and in Milford. Bayhealth provides a wide range of medical services, including cardiovascular, cancer, orthopaedics and rehabilitation, pediatrics, respiratory care, sleep care, surgical weight loss and women’s services.