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High CholesterolOverview
What is high cholesterol?Cholesterol is a type of fat called a lipid. The body uses it for many things, such as making new cells. Your body makes the cholesterol that it needs. You also get cholesterol from the foods you eat. Your body needs some
cholesterol. But if you have too much, it starts to build up in your arteries.
(Arteries are the blood vessels that carry blood away from the heart.) This is
called hardening of the arteries, or
atherosclerosis To understand what happens, think about how a clog forms in the pipe under a kitchen sink. Like the buildup of grease in the pipe, the buildup of cholesterol narrows your arteries and makes it harder for blood to flow through them. It reduces the amount of blood that gets to your body tissues, including your heart. This can lead to serious problems, including heart attack and stroke. A simple blood test tells you how much cholesterol you have. The test results are given in mg/dL of cholesterol but most people just say the numbers. Your cholesterol numbers help your doctor know your risk of heart attack. To know this risk, your doctor will also take into account other factors like your age, blood pressure, family history, and if you smoke. For a general idea about your total cholesterol number, compare your number to the following:
What are the symptoms?High cholesterol doesn't make you feel sick. But if cholesterol builds up in your arteries, it can block blood flow to your heart or brain and cause a heart attack or stroke. By the time you find out you have it, it may already be clogging your arteries. So it is very important to start treatment even though you may feel fine. What are the different kinds of cholesterol?Cholesterol travels through the blood attached to a protein. This package of cholesterol (a lipid) and protein is called a lipoprotein. Lipoproteins are either high-density or low-density, based on how much protein and fat they have.
It may help to think of HDL as the “Healthy” cholesterol and LDL as the “Lousy” cholesterol. Or you could remember that HDL should be High and LDL should be Low. Experts have come up with goals for
each type of cholesterol. Your doctor will help you decide on cholesterol goals
based on your risk of heart attack and stroke. Your doctor will help you know
this risk. To find out your risk of a heart attack, you can use the
Interactive Tool: Are You at Risk for a Heart Attack?
What causes high cholesterol?Many things can cause high cholesterol, including:
How is high cholesterol diagnosed?Doctors use a blood test to check cholesterol.
How is it treated?The two main treatments are lifestyle changes and medicines. The goal of treatment is to lower your "bad" LDL cholesterol and reduce your risk of a heart attack. You may also need to raise your "good" HDL cholesterol. A high level of HDL helps reduce your risk of heart problems. Some lifestyle changes are important for everyone with high cholesterol. Your doctor will probably want you to:
Sometimes lifestyle changes are enough on their own. But if you try them for a few months and they don't lower your cholesterol enough, your doctor may prescribe a cholesterol-lowering medicine called a statin. You also may need medicines to lower triglycerides or raise HDL. You may need to start taking medicine
right away if your cholesterol is very high or if you have another problem that
increases your chance of having a heart attack. People who have a high risk for
heart attack benefit from taking higher doses of statins to lower their LDL
cholesterol as much as possible. The more these people can lower their LDL, the
less likely they are to have a heart attack.1 To find
out your risk, use the
Interactive Tool: Are You at Risk for a Heart Attack? It is important to take your medicine just the way your doctor tells you to. If you stop taking your medicine, your cholesterol will go back up. You will need to have your cholesterol checked regularly. Your results can help your doctor know if lifestyle changes have helped or if you need more or different medicines.
Health ToolsHealth Tools help you make wise health decisions or take action to improve your health.
Frequently Asked QuestionsCauseHigh cholesterol may run in your family. The foods you eat may also cause high cholesterol. Causes include:
In rare cases, high cholesterol is caused by an inherited problem called a lipid disorder that changes the way the body handles cholesterol. People with lipid disorders may have total cholesterol levels well over 250 milligrams per deciliter (mg/dL). Certain types of inherited lipid disorders may be more difficult to treat. SymptomsHigh cholesterol does not make you feel sick. It is usually found during a
routine
cholesterol and triglycerides test, a blood test that
measures cholesterol levels. You may first discover it when you are diagnosed
with a condition that is caused in part by high cholesterol, such as
coronary artery disease Some people with lipid disorders, such as familial hypercholesterolemia, may have other distinct symptoms such as deposits of excess cholesterol that collect in the skin. These cholesterol deposits can also cause bumps in tendons in the hands or feet. What HappensEither high LDL cholesterol or low HDL cholesterol may lead to the buildup of cholesterol (plaque) in artery walls. This buildup, called atherosclerosis, hardens and narrows arteries and reduces blood flow to body tissues, including the heart muscle. Atherosclerosis can lead to:
Use the
Interactive Tool: Are You at Risk for a Heart Attack? Cholesterol levels naturally increase with age. They also increase after menopause in women and as a result of certain medical conditions, such as diabetes. What Increases Your RiskSome things that increase your risk for high cholesterol are within your control; some are not. It is important to lower your risk as much as possible. Things you can control include:
You may be able to control some other conditions that can raise cholesterol, including diabetes and metabolic syndrome. Things you cannot control include:
When to Call a DoctorHigh cholesterol usually has no symptoms. Sometimes the first sign that you have high cholesterol or other risk factors for heart disease is a heart attack, a stroke, or a transient ischemic attack (TIA). If you have any symptoms of these, call 911 or other emergency services. Symptoms of aheart attack include:
Symptoms of a stroke or TIA include:
Call your doctor for an appointment if you:
Who to SeeAny one of the following doctors, nurses, or specialists can order a cholesterol test and treat high cholesterol:
A registered dietitian can help you with a diet to lower your cholesterol. People who have rare lipid disorders, which can be more difficult to treat, may need to see a specialist, often an endocrinologist. You may need to see a cardiologist if you are diagnosed with heart disease. Exams and TestsYou will need a blood test to check whether you have high cholesterol.
Your total cholesterol level is important but the levels of your lipoproteins, including LDL, HDL, and triglycerides, help your doctor make decisions about whether you need treatment for high cholesterol. Your doctor will also take into account your overall health and your risk of heart attack. The following tables will help you understand the results of your cholesterol tests. All numbers are milligrams per deciliter (mg/dL), but most people just say the numbers. Total cholesterol Your total cholesterol level shows if your cholesterol is high or low. If you have high cholesterol, your doctor will want to know your LDL and HDL levels before deciding whether you need treatment and what sort of treatment you need.
LDL cholesterol You want your LDL level to be low. But how low your LDL should be depends on your risk of heart attack. This table shows the LDL levels for someone with an average risk of heart attack. Your own LDL goal may change, based on your risk of heart attack. This risk is based on your age and on whether you smoke, have high blood pressure, have a low HDL level, have diabetes, or have one or more close relatives who have or had early coronary artery disease.
Your doctor will help decide what your LDL goal is and if you need any treatment to lower your LDL. The higher your risk of heart attack, the lower your LDL goal. HDL cholesterol You want your HDL level high. HDL (good) cholesterol goals are different for men and women. But for everyone, the higher your HDL, the better. HDL over 60 helps protect against a heart attack. HDL below 40 increases your risk of heart problems. A high HDL number can help offset a high LDL number.
Triglycerides You want your triglyceride level to be low.
When you visit your doctor to talk about your cholesterol test, you will talk about other things that increase your risk for heart problems, such as smoking, diabetes, high blood pressure, and a family history of high cholesterol and heart attack. Your doctor will use all of this information, along with your cholesterol numbers, to decide whether you need treatment and what type of treatment you need. Your doctor will
help you figure out your risk of heart attack or stroke. But you can check your
own risk for a heart attack by using the
Interactive Tool: Are You at Risk for a Heart Attack? If you have a high risk of a heart attack, or if you already have heart problems, your doctor will be more likely to prescribe medicine along with lifestyle changes. For more information about heart disease, see the topic Coronary Artery Disease. You may need other tests to determine whether another health problem, such as hypothyroidism, is causing your high cholesterol. Some medicines may also cause high cholesterol, so it is important to tell your doctor about everything you take. If you have high cholesterol, your doctor may suggest that you get a test for diabetes. A C-reactive protein (CRP) test may be done for some people who are at risk for getting coronary artery disease. A special type of CRP test, the high-sensitivity CRP test (hs-CRP), can help find out your chance of having a sudden heart problem, such as a heart attack. This test may be done even if you have a normal or low level of LDL cholesterol.
Early DetectionSome doctors and health organizations recommend that everyone older than 20 be checked for high cholesterol. How often you need to be checked depends on whether you have other health problems and your overall chance of heart disease.
Treatment OverviewThe goal in treating high cholesterol is to reduce your chances of having a heart attack or stroke. Most people need to adjust their lifestyles to eat less saturated fat and trans fat, be more active, and lose weight if needed. Others also need to take one or more medicines. No matter what approach you need, your treatment will focus on lowering your "bad" LDL cholesterol. You may also need to raise your "good" HDL cholesterol at the same time. Although it may seem odd to raise a type of cholesterol, HDL can help remove the LDL from your arteries. Initial treatmentAfter your doctor has looked at your cholesterol test, he or she will base your treatment on your cholesterol levels and overall health. First, you will need some guidance on how to eat. Your doctor may suggest that you follow a cholesterol-lowering diet that cuts back on saturated fat while still allowing good fat such as olive and canola oils. Increasing your activity is very important. Exercise can raise your HDL and may help you lose weight, if you need to. If you smoke, quitting will also help you raise your HDL. For more information on quitting smoking, see the topic Quitting Smoking. If you have diabetes, high blood pressure, or coronary artery disease (CAD) or if your cholesterol is very high, you may need to start on medicine right away. This is because your chances of having a heart attack are high, and medicines can reduce this risk. Use the
Interactive Tool: Are You at Risk for a Heart Attack? This interactive tool will tell you your percentage of risk. After you know this, you can find your risk category for treatment. Your doctor will base your need for medicine on your risk category. After you have checked your risk, you can learn more about your treatment. If you need medicine, it likely will be a statin. These drugs reduce the body's natural production of cholesterol. They are proved to lower the risk of heart attack, stroke, and death in people with a high risk of heart attack or stroke.2, 3
Some statins are combined with another medicine.
Your doctor may prescribe other medicines. Some are used with a statin.
Guidelines from the U.S. National Cholesterol Education Panel (NCEP) recommend higher doses of statins for people who have a moderate to high risk of heart attack.4 The goal is to lower your chances of having a heart attack or stroke. Side effects are more likely and may be more severe when higher doses of statins are used. You are considered at very high risk if you have coronary artery disease and you also have diabetes, acute coronary syndrome, or metabolic syndrome or you smoke. Work with your doctor to treat other diseases that you may have, such as high blood pressure and diabetes, and to stop smoking, if you smoke. Ongoing treatmentAs you continue your treatment for high cholesterol, your doctor will check your cholesterol at times, to see how you are doing. If you have been trying lifestyle changes alone, another cholesterol test can show if those changes have helped or if you need to add medicine to your treatment. If you are taking medicine already, a cholesterol test can show whether you need your dose lowered or increased or whether you need a different drug. At this time you may also want to ask for help if you are having trouble changing how you eat. Your doctor can recommend a dietitian to help you plan meals. Staying physically active is important. Managing your weight and exercising are important because they can help you raise your HDL and lower your LDL levels. Research shows that people who exercise longer have more improvement in their LDL and HDL levels.5 Losing weight can also help lower high blood pressure. For more information, see the topics Fitness and Weight Management. Treatment if the condition gets worseIt is important to follow your doctor's advice for making lifestyle changes and taking medicines, if prescribed. If high cholesterol is not treated, it can lead to coronary artery disease, heart attack, and stroke. What to think aboutHigh cholesterol that is caused by inherited (genetic) lipid disorders usually is treated with medicines. PreventionEating a diet low in saturated fat, trans fat, and cholesterol, getting plenty of exercise, managing your weight, and not smoking can help prevent high cholesterol. Because cholesterol levels tend to increase with age, paying attention to diet and exercise is particularly important as you get older. Remember that high cholesterol is just one of the things that increase your risk for coronary artery disease (CAD) and heart attack. Controlling other health problems, such as high blood pressure and diabetes, is also important to reduce your overall risk. Lifestyle ChangesEating a sensible diet low in saturated fat, trans fat, and cholesterol, getting moderate exercise, and losing excess weight are important ways you can lower your high cholesterol level. For many people, these lifestyle changes may be all that is needed to decrease LDL cholesterol and raise HDL cholesterol. If high cholesterol runs in your family, you may not be able to reduce your cholesterol level by following a strict diet and exercise routine only. In this case, you may need to take medicine. As part of the treatment for high cholesterol, your doctor may recommend using the Therapeutic Lifestyle Changes (TLC) recommended by the National Cholesterol Education Program of the U.S. National Institutes of Health. These lifestyle changes recommend:
The TLC diet is low in saturated fat and cholesterol. Less than 7% of your daily calories should come from saturated fat, and you should limit your cholesterol to no more than 200 milligrams a day. A chart with several heart-healthy diets Saturated fat and cholesterol are in foods that come from animals, such as meats, poultry, fish, whole milk, egg yolks, butter, and cheese. Trans fat is found in fried foods and packaged foods, such as cookies, crackers, and chips. The TLC plan also recommends increasing the amount of fiber you eat and adding plant stanols and sterols to your diet. Plant sterols are found in small quantities in many fruits, vegetables, nuts, seeds, cereals, legumes, and other plant sources. Plant stanols come from some of the same sources. Vegetable oils, for example, contain both plant sterols and plant stanols. You can also find them in some salad dressings and margarines, such as Benecol and Take Control. They are safe for children who have genetic high cholesterol, but pregnant women need to avoid them. For more information about the TLC diet, see:
You might also consider following the Mediterranean diet, which is similar to the TLC diet. On the Mediterranean diet, an average of 35% of calories can come from fat, mainly from unsaturated oils, such as fish oils, olive oil, and certain nut or seed oils (such as canola, soybean, or flaxseed oil). See the following for more information about food and high cholesterol:
Not recommended for reducing cholesterol
MedicationsStatins are the most effective and widely used medicines to treat high cholesterol. Evidence shows that statins can reduce the risk for heart attack, stroke, and death in people who are at high risk of a heart attack or stroke.3 Other medicines also lower cholesterol, and some may be used to lower triglycerides or raise HDL.
Your doctor may follow NCEP and American Heart Association medicine guidelines in deciding whether you should take medicine to lower your cholesterol. The guidelines base treatment on your LDL level and your risk for CAD. Cholesterol treatment guidelines will continue to evolve as experts learn more about how best to treat heart disease. But everyone can benefit from eating a balanced low-fat diet, getting regular exercise, and reducing other heart disease risks, such as smoking. Medication ChoicesThe following medicines can be used to lower LDL and triglyceride levels in the blood and to raise HDL.
Some statins are combined with another medicine.
Your doctor may prescribe other medicines. Some are used with a statin.
What to Think About
To help you decide whether medicine to lower cholesterol is right for you, see: SurgeryMost people who have high cholesterol can be successfully treated with medicine and lifestyle changes. If high cholesterol causes coronary artery disease, you eventually may need surgery to open or bypass a blocked artery. Related Information
References
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