Medical Dictionary |
A Medical Dictionary of Medical Terminology
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Cholesterol is a waxy, fat-like substance that's found in all the cells in your body. Your body needs some cholesterol to make hormones, vitamin D, and substances that help you digest foods. Your body makes all the cholesterol it needs. Cholesterol is also found in foods from animal sources, such as egg yolks, meat, and cheese.
If you have too much cholesterol in your blood, it can combine with other substances in the blood to form plaque. Plaque sticks to the walls of your arteries. This buildup of plaque is known as atherosclerosis. It can lead to coronary artery disease, a condition in which your coronary arteries become narrow or even blocked.
What are HDL, LDL, and VLDL?HDL, LDL, and VLDL are lipoproteins. They are a combination of fat (lipid) and protein. The lipids need to be attached to the proteins so they can move through the blood. Different types of lipoproteins have different purposes:
The most common cause of high cholesterol is an unhealthy lifestyle. This can include:
Genetics may also cause people to have high cholesterol. For example, familial hypercholesterolemia (FH) is an inherited condition that causes very high levels of cholesterol in the blood. Other medical conditions and certain medicines may also raise LDL cholesterol levels or lower HDL cholesterol levels.
What can raise my risk of high cholesterol?A variety of things can raise your risk of high cholesterol:
Undiagnosed or untreated high blood cholesterol can lead to serious health problems:
There are usually no signs or symptoms that you have high cholesterol. A blood test can measure your cholesterol levels. When and how often you should get this test depends on your age, risk factors, and family history. The general recommendations are:
For people who are age 19 or younger::
For people who are ages 20 to 65::
For people over age 65:
You can lower your cholesterol through heart-healthy lifestyle changes. They include a heart-healthy eating plan, weight management, and regular physical activity.
If the lifestyle changes alone do not lower your cholesterol enough, you may also need to take medicines. There are several types of cholesterol-lowering medicines available, including statins. If you take medicines to lower your cholesterol, you still should continue with the lifestyle changes.
Some people with familial hypercholesterolemia (FH) may receive a treatment called lipoprotein apheresis. This treatment uses a filtering machine to remove LDL cholesterol from the blood. Then the machine returns the rest of the blood back to the person.
NIH: National Heart, Lung, and Blood Institute
Cholesterol is a waxy, fat-like substance that that's found in all the cells in your body. Your body needs some cholesterol to work properly. But if you have too much of it in your blood, it can stick to the walls of your arteries and narrow or even block them. This puts you at risk of coronary artery disease and other heart diseases.
How do you measure cholesterol levels?A blood test called a lipoprotein or lipid panel can measure your cholesterol levels. Before the test, you'll need to fast (not eat or drink anything but water) for 9 to 12 hours. The test gives information about your:
Cholesterol numbers are measured in milligrams per deciliter (mg/dL). Talk with your healthcare provider about what your cholesterol numbers should be. The numbers that are best for you may depend on your age, race, blood pressure, weight, family history, and more. However, here are some general guidelines showing the desirable levels (levels that are healthy for most people):
Anyone age 19 or younger:
Type of CholesterolHealthy LevelTotal CholesterolLess than 170 mg/dLNon-HDLLess than 120 mg/dLLDLLess than 110 mg/dLHDLMore than 45 mg/dLMen age 20 or older:
Type of CholesterolHealthy LevelTotal CholesterolLess than 200 mg/dLNon-HDLLess than 130 mg/dLLDLLess than 100 mg/dLHDLGreater than or equal to 60 mg/dL is best. Levels less than 40 mg/dL are considered low.Women age 20 or older:
Type of CholesterolHealthy LevelTotal CholesterolLess than 200 mg/dLNon-HDLLess than 130 mg/dLLDLLess than 100 mg/dLHDLGreater than or equal to 60 mg/dL is best. Levels less than 50 mg/dL are considered low.Triglycerides are not a type of cholesterol, but they are also measured in this test. A normal triglyceride level is below 150 mg/dL. You might need treatment if you have triglyceride levels that are borderline high (150-199 mg/dL) or high (200 mg/dL or more).
How often should I get a cholesterol test?When and how often you should get a cholesterol test depends on your age, risk factors, and family history. The general recommendations are:
For people who are age 19 or younger:
For people who are ages 20 to 65:
For people older than 65::
Many factors can affect your cholesterol levels. Some of them are things you can change:
Some factors that you cannot change can also affect cholesterol levels, such as:
You can lower your cholesterol through heart-healthy lifestyle changes. They include a heart-healthy eating plan, weight management, and regular physical activity.
If the lifestyle changes alone do not lower your cholesterol enough, you may also need to take medicines. There are several types of cholesterol-lowering medicines available, including statins. If you take medicines to lower your cholesterol, you still should continue with the lifestyle changes.
NIH: National Heart, Lung, and Blood Institute
Cholesterol is a waxy, fat-like substance that that's found in all the cells in your body. Your body needs some cholesterol to work properly. But if you have too much of it in your blood, it can stick to the walls of your arteries and narrow or even block them. This puts you at risk for coronary artery disease and other heart diseases.
Cholesterol is made by your liver. It travels through the blood on proteins called lipoproteins. One type of lipoprotein, LDL, is sometimes called the "bad" cholesterol. A high LDL level leads to a buildup of cholesterol in your arteries. Another type, HDL, is sometimes called the "good" cholesterol. It carries cholesterol from other parts of your body back to your liver. Then your liver removes the cholesterol from your body.
What are the treatments for high cholesterol?The main treatments for high cholesterol are heart-healthy lifestyle changes and medicines. The lifestyle changes include healthy eating, weight management, and regular physical activity.
How can I lower cholesterol with diet?Heart-healthy lifestyle changes include a diet to lower your cholesterol. The DASH eating plan is one example. Another is the Therapeutic Lifestyle Changes (TLC) diet, which recommends that you:
Choose healthier fats.You should limit both total fat and saturated fat. No more than 25 to 35% of your daily calories should come from dietary fats, and less than 7% of your daily calories should come from saturated fat. Depending upon how many calories you eat per day, here are the maximum amounts of saturated fats that you should eat:
Calories per DaySaturated Fat1,2008 grams1,50010 grams2,00013 grams2,50017 gramsSaturated fat is a bad fat because it raises your LDL (bad cholesterol) level more than anything else in your diet. It is found in some meats, dairy products, chocolate, baked goods, and deep-fried and processed foods.
Instead of saturated fats, switch to foods with healthier fats, such as lean meat, nuts, and unsaturated oils like canola, olive, and safflower oils.
Limit foods with cholesterol. If you are trying to lower your cholesterol, you should have less than 200 mg a day of cholesterol. Cholesterol is in foods from animals, such as liver and other organ meats, egg yolks, shrimp, and whole milk dairy products.
Eat plenty of soluble fiber. Soluble fiber helps prevent your digestive tract from absorbing cholesterol. You should try to get 10 to 25 grams of it per day. Foods that are high in soluble fiber include:
Eat lots of fruits and vegetables. They are important sources of vitamins, fiber, and other nutrients.
Increase plant stanols and sterols in your diet.These are substances that also help prevent your digestive tract from absorbing cholesterol. You should try to get 2 grams of them per day. They can be found in whole grains, nuts, legumes, and oils, such as olive oil and avocado oil. They are also added to some foods, such as certain types of orange juice, margarine, and bread.
Eat foods that are high in omega-3 fatty acids. These special fats can lower LDL and triglyceride levels. They can also help control blood pressure and may lower your risk of heart rhythm problems. If you have heart disease, they may lower your risk of heart attack. Omega-3 fatty acids can be found in:
Limit salt. You should try to limit the amount of sodium (salt) that you eat to no more than 2,300 milligrams (about 1 teaspoon of salt) a day. That includes all the sodium you eat, whether it's added in cooking, used at the table, or already present in food products. Limiting salt won't lower your cholesterol, but it can lower your risk of heart diseases by helping to lower your blood pressure. You can reduce your sodium by instead choosing low-salt and "no added salt" foods and seasonings at the table or while cooking.
Limit alcohol. Alcohol adds extra calories, which can lead to weight gain. Being overweight can raise your LDL level and lower your HDL level. Too much alcohol can also increase your risk of heart diseases because it can raise your blood pressure and triglyceride level. It's best not to drink, but if you do:
Nutrition labels can help you figure out how much fat, saturated fat, cholesterol, fiber, and sodium is in the foods that you buy. This can help you eat healthier and lower your cholesterol.
NIH: National Heart, Lung, and Blood Institute
Cholesterol is a waxy, fat-like substance that that's found in all the cells in your body. Your body needs some cholesterol to work properly. But if you have too much of it in your blood, it can stick to the walls of your arteries and narrow or even block them. This puts you at risk for coronary artery disease and other heart diseases.
Cholesterol is made by your liver. It travels through the blood on proteins called lipoproteins. One type of lipoprotein, LDL, is sometimes called the "bad" cholesterol. A high LDL level leads to a buildup of cholesterol in your arteries. Another type, HDL, is sometimes called the "good" cholesterol. It carries cholesterol from other parts of your body back to your liver. Then your liver removes the cholesterol from your body.
What are the treatments for high cholesterol?If you have high cholesterol, lifestyle changes can help you lower your cholesterol levels. But sometimes the lifestyle changes are not enough, and you need to take cholesterol medicines. But you should still continue with the lifestyle changes even though you are taking medicines.
Who needs cholesterol medicines?Your health care provider may prescribe cholesterol medicines for you if:
There are several types of cholesterol-lowering drugs available, including:
There are also a few other cholesterol medicines (lomitapide and mipomersen) that are only for people who have FH.
How does my health care provider decide which cholesterol medicine I should take?When deciding which medicine you should take and which dose you need, your provider will consider:
Medicines can help control your cholesterol, but they don't cure it. You need to keep taking your medicines and get regular cholesterol checks to make sure that your cholesterol levels are in a healthy range.
Cholesterol is a waxy, fat-like substance that's found in all the cells in your body. Your liver makes cholesterol, and it is also in some foods, such as meat and dairy products. Your body needs some cholesterol to work properly. But having too much cholesterol in your blood raises your risk of coronary artery disease.
What are HDL and LDL?HDL and LDL are two types of lipoproteins.They are a combination of fat (lipid) and protein. The lipids need to be attached to the proteins so they can move through the blood. HDL and LDL have different purposes:
A blood test can measure your cholesterol levels, including HDL. When and how often you should get this test depends on your age, risk factors, and family history. The general recommendations are:
For people who are age 19 or younger::
For people who are age 20 or older::
With HDL cholesterol, higher numbers are better, because a high HDL level can lower your risk for coronary artery disease and stroke. How high your HDL should be depends on your age and sex:
GroupHealthy HDL LevelAge 19 or youngerMore than 45mg/dlMen age 20 or olderMore than 40mg/dlWomen age 20 or olderMore than 50mg/dlHow can I raise my HDL level?If your HDL level is too low, lifestyle changes may help. These changes may also help prevent other diseases, and make you feel better overall:
Some cholesterol medicines, including certain statins, can raise your HDL level, in addition to lowering your LDL level. Health care providers don't usually prescribe medicines only to raise HDL. But if you have a low HDL and high LDL level, you might need medicine.
What else can affect my HDL level?Taking certain medicines can lower HDL levels in some people. They include:
If you are taking one of these and you have a very low HDL level, ask your provider if you should continue to take them.
Diabetes can also lower your HDL level, so that gives you another reason to manage your diabetes.
Cholesterol is a waxy, fat-like substance that's found in all the cells in the body. The liver makes cholesterol, and it is also in some foods, such as meat and dairy products. The body needs some cholesterol to work properly. But if your child or teen has high cholesterol (too much cholesterol in the blood), it can stick to the walls of their arteries and narrow or even block the arteries. This can put your child or teen at risk of coronary artery disease and other heart diseases.
What causes high cholesterol in children and teens?Three main factors contribute to high cholesterol in children and teens:
Some diseases, such as diabetes, kidney disease, and certain thyroid diseases, can also cause high cholesterol in children and teens.
What are the symptoms of high cholesterol in children and teens?There are usually no signs or symptoms that your child or teen has high cholesterol.
How do I know if my child or teen has high cholesterol?There is a blood test to measure cholesterol levels. The test gives information about:
For anyone aged 19 or younger, the healthy levels of cholesterol are
Type of CholesterolHealthy LevelTotal CholesterolLess than 170 mg/dLNon-HDLLess than 120 mg/dLLDLLess than 110 mg/dLHDLMore than 45 mg/dLWhen and how often your child or teen should get this test depends on their age, risk factors, and family history. The general recommendations are:
Lifestyle changes are the main treatment for high cholesterol in children and teens. These changes include:
If everyone in the family makes these changes, it will be easier for your child or teen to stick to them. It is also an opportunity to improve your health, and the health of the rest of your family.
Sometimes these lifestyle changes are not enough to lower your child or teen's cholesterol. Their health care provider may consider giving your child or teen cholesterol medicines if they:
Cholesterol is a waxy, fat-like substance that that's found in all the cells in your body. Your body needs some cholesterol to work properly. But if you have too much of it in your blood, it can stick to the walls of your arteries and narrow or even block them. This puts you at risk for coronary artery disease and other heart diseases.
Cholesterol is made by your liver. It travels through the blood on proteins called lipoproteins. One type of lipoprotein, LDL, is sometimes called the "bad" cholesterol. A high LDL level leads to a buildup of cholesterol in your arteries. Another type, HDL, is sometimes called the "good" cholesterol. It carries cholesterol from other parts of your body back to your liver. Then your liver removes the cholesterol from your body.
There are steps that you can take to lower your LDL (bad) cholesterol and raise your HDL (good) cholesterol. By keeping your cholesterol levels in range, you can lower your risk of heart diseases.
What are the main treatments for high cholesterol?The main treatments for high cholesterol are lifestyle changes and medicines.
Lifestyle changes to lower cholesterolHeart-healthy lifestyle changes that can help you lower or control your cholesterol include:
For some people, making lifestyle changes alone does not their lower cholesterol enough. They may also need to take cholesterol medicines. There are several types. They work in different ways and can have different side effects. If your provider recommends that you take cholesterol medicines, ask them which medicine would be right for you.
Even if you take medicines to lower your cholesterol, you still need to continue with lifestyle changes.
What are some other possible treatments for high cholesterol?Some other possible treatments for high cholesterol may include:
Lipoprotein apheresis to lower cholesterolFamilial hypercholesterolemia (FH) is an inherited condition that causes very high levels of cholesterol in the blood. Some people who have FH may get a treatment called lipoprotein apheresis. This treatment uses a filtering machine to remove LDL cholesterol from your blood. Then the machine returns the rest of your blood back to your body.
Supplements to lower cholesterolMany companies sell supplements that they say can lower cholesterol. For many of these supplements, there isn't enough evidence to show that they can lower cholesterol levels. But for some supplements, research has found that they have cholesterol-lowering effects. For example:
Supplements may cause side effects and interactions with medicines. Always check with your provider before you take any supplements.
Cholesterol is a waxy, fat-like substance that's found in all the cells in your body. Your liver makes cholesterol, and it is also in some foods, such as meat and dairy products. Your body needs some cholesterol to work properly. But having too much cholesterol in your blood raises your risk of coronary artery disease.
What are LDL and HDL?LDL and HDL are two types of lipoproteins. They are a combination of fat (lipid) and protein. The lipids need to be attached to the proteins so they can move through the blood. LDL and HDL have different purposes:
If you have a high LDL level, this means that you have too much LDL cholesterol in your blood. This extra LDL, along with other substances, forms plaque. The plaque builds up in your arteries; this is a condition called atherosclerosis.
Coronary artery disease happens when the plaque buildup is in the arteries of your heart. It causes the arteries to become hardened and narrowed, which slows down or blocks the blood flow to your heart. Because your blood carries oxygen to your heart, this means that your heart may not be able to get enough oxygen. This can cause angina (chest pain), or if the blood flow is completely blocked, a heart attack.
How do I know what my LDL level is?A blood test can measure your cholesterol levels, including LDL. When and how often you should get this test depends on your age, risk factors, and family history. The general recommendations are:
For people who are age 19 or younger::
For people who are age 20 or older::
For people who are older than 65:
You may need to get your cholesterol checked more often if you have heart disease, diabetes, or a family history of high cholesterol.
What can affect my LDL level?Things that can affect your LDL level include:
With LDL cholesterol, lower numbers are better, because a high LDL level can raise your risk for coronary artery disease and related problems. The general ranges for healthy adults are:
LDL (Bad) Cholesterol LevelLDL Cholesterol CategoryLess than 100 mg/dLOptimal100-129 mg/dLNear optimal/above optimal130-159 mg/dLBorderline high160-189 mg/dLHigh190 mg/dL and aboveVery HighIf you have coronary artery disease or are at high risk for it, your health care provider may have different goals for your LDL level.
How can I lower my LDL level?There are two main ways to lower your LDL cholesterol level:
Some people with familial hypercholesterolemia (FH) may receive a treatment called lipoprotein apheresis. This treatment uses a filtering machine to remove LDL cholesterol from the blood. Then the machine returns the rest of the blood back to the person.
NIH: National Heart, Lung, and Blood Institute
Cholesterol is a waxy, fat-like substance that's found in all the cells in your body. Your liver makes cholesterol, and it is also in some foods, such as meat and dairy products. Your body needs some cholesterol to work properly. But having too much cholesterol in your blood raises your risk of coronary artery disease.
What is VLDL cholesterol?VLDL stands for very-low-density lipoprotein. Your liver makes VLDL and releases it into your bloodstream. The VLDL particles mainly carry triglycerides, another type of fat, to your tissues. VLDL is similar to LDL cholesterol, but LDL mainly carries cholesterol to your tissues instead of triglycerides.
VLDL and LDL are sometimes called "bad" cholesterols because they can contribute to the buildup of plaque in your arteries. This buildup is called atherosclerosis. The plaque that builds up is a sticky substance made up of fat, cholesterol, calcium, and other substances found in the blood. Over time, the plaque hardens and narrows your arteries. This limits the flow of oxygen-rich blood to your body. It can lead to coronary artery disease and other heart diseases.
How do I know what my VLDL level is?There isn't a way to directly measure your VLDL level. Instead, you will most likely get a blood test to measure your triglyceride level. The lab can use your triglyceride level to estimate what your VLDL level is. Your VLDL is about one-fifth of your triglyceride level. However, estimating your VLDL this way does not work if your triglyceride level is very high.
What should my VLDL level be?Your VLDL level should be less than 30 mg/dL (milligrams per deciliter). Anything higher than that puts you at risk for heart disease and stroke.
How can I lower my VLDL level?Since VLDL and triglycerides are linked, you can lower VLDL level by lowering your triglyceride level. You may be able to lower your triglycerides with a combination of losing weight, diet, and exercise. It is important to switch to healthy fats, and cut back on sugar and alcohol. Some people may also need to take medicines.
Cholesterol is a waxy, fat-like substance that that's found in all the cells in your body. Your body needs some cholesterol to work properly. But if you have too much of it in your blood, it can stick to the walls of your arteries and narrow or even block them. This puts you at risk for coronary artery disease and other heart diseases.
Cholesterol is made by your liver. It travels through the blood on proteins called lipoproteins. One type of lipoprotein, LDL, is sometimes called the "bad" cholesterol. A high LDL level leads to a buildup of cholesterol in your arteries. Another type, HDL, is sometimes called the "good" cholesterol. It carries cholesterol from other parts of your body back to your liver. Then your liver removes the cholesterol from your body.
What are statins?Statins are a type of cholesterol medicine. Your health care provider may prescribe them if you have high cholesterol and making lifestyle changes does not lower your cholesterol enough. Statins are the most common medicines used to treat high cholesterol.
How do statins lower cholesterol?Statins lower LDL cholesterol by slowing down how much cholesterol the liver makes. They also increase your liver's ability to remove LDL cholesterol that is already in the blood. This can slow the formation of plaques in your arteries. Studies have shown that statins lower the risk of heart attack and stroke in people with high LDL cholesterol.
Statins can lower your triglyceride level as well. Triglycerides are another type of fat in your blood that can raise the risk of heart disease. Statins may also increase your HDL cholesterol.
What are the risks of taking statins?Statins usually don't cause side effects, but they may raise the risk of type 2 diabetes. However, this mainly happens in people already at high risk of diabetes, such as those who are overweight or have obesity, prediabetes, or metabolic syndrome.
Statins may also cause abnormal results on liver enzymes tests, but actual liver damage is very rare. Another uncommon side effect is muscle damage. In rare cases, this muscle damage can lead to muscle pain and kidney damage.
You should not take statins if you are pregnant or breastfeeding. They are also not recommended for people who have certain types of liver disease.
How can I safely take statins?To safely take statins, you should: