Do I Need To Cut Down On Dietary Cholesterol
Most people dont need to cut down on the cholesterol thats found in foods- so you can still enjoy eggs and shellfish.
Its much more important to cut down on foods which contain saturated fats. Thats because saturated fats affect how the liver handles cholesterol. So, eating saturated fats can raise your blood cholesterol. Try to replace saturated fats with unsaturated fats which are better for your heart.
For some people those with familial hypercholesterolaemia , those who have high cholesterol, and those who are at high risk of or have cardiovascular disease the recommendation is to limit cholesterol in food to no more than 300mg a day. In the case of FH, ideally less than 200 mg a day.
Even though dietary cholesterol only has a small effect on blood cholesterol, people with high cholesterol and FH already have high levels of blood cholesterol, so it seems sensible not to eat too much cholesterol in food.
How Cholesterol Moves Around The Body
Cholesterol is a white, insoluble and waxy substance. It is carried around the body by two key transport systems in the blood, which include:
- Low-density lipoprotein cholesterol carries most of the cholesterol that is delivered to cells. It is called the bad cholesterol because when its level in the bloodstream is high, it can clog up your arteries.
- High-density lipoprotein cholesterol is called the good cholesterol, because it helps remove excess cholesterol out of the cells, including cells in the arteries.
Functions Of Cholesterol In The Body
1. Producing Hormones
Cholesterol is essential for the bodys creation of steroid hormones. The steroid hormones most people are familiar with are sex hormones, such as testosterone, estrogen and progesterone. These hormones are needed for reproductive functioning and development of sex characteristics such as facial hair. Other types of steroid hormones related with cholesterol include cortisol and aldosterone. Cortisol is needed for blood sugar maintenance and infection prevention while aldosterone plays a part in water retention.
2. Creating Vitamin D
Vitamin D is important because it helps the bodys nervous system function properly. Vitamin D is also critical in other aspects, such as blood sugar regulation, mineral absorption, proper immune response, metabolism and reproduction. Humans can get vitamin D from multiple sources, including foods that are high in cholesterol, such as eggs and fish oil. Cholesterol also helps the body produce vitamin D from sunlight.
3. Aiding Digestion
One function of cholesterol in the body is better digestion. Without cholesterol, the body could not digest fat. When a person consumes food that contains fat, the gallbladder releases bile which breaks down large chunks of fat into much smaller particles that can be effectively digested by the body. Additionally, bile is needed for the body to properly absorb vitamins D, A, E and K. These vitamins are fat-soluble, so it makes sense that bile is required for proper use of vitamins.
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When High Cholesterol Is A Good Thing
On the other hand, if you have higher levels of high-density lipoproteins the good cholesterol it may provide some protection from heart disease.
HDL cholesterol helps rid the body of bad cholesterol and keeps it from collecting on the linings of your arteries. Cholesterol buildup can lead to severe health events such as heart attack or stroke.
Having lower HDL cholesterol does not appear to cause problems directly. But its an important characteristic to note when identifying individuals who may have an overall unhealthy lifestyle.
Recommendations for more healthy choices include:
What Is High Cholesterol
High cholesterol is when there’s too much bad cholesterol and/or not enough good cholesterol in your blood.
This picture shows what it looks like if you have low cholesterol, normal cholesterol and bad cholesterol levels.
Sometimes health professionals talk about the terms dyslipidaemia and hyperlipidaemia. Both are clinical terms that mean your levels of cholesterol are outside the normal range.
Symptoms of high cholesterol
You won’t know if you have high cholesterol because it doesn’t usually have symptoms. The only way to know is to have a blood test.
Why does high cholesterol matter?
When your cholesterol is too high it can build up as plaque in your arteries. If the plaque gets too big, or breaks off, it can cause a heart attack and stroke. This risk also increases when your triglycerides are too high.
Your doctor will use the results of your blood test and your other heart attack risk factors to decide whether you need medication to lower your cholesterol or triglyceride levels.
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What Treatments Are Available For High Cholesterol
Treatment may include:
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Addressing risk factors. Some risk factors that can be changed include lack of exercise and poor eating habits.
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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. The two most effective types are atorvastatin and rosuvastatin. Other medicines that lower cholesterol levels are ezetimibe and PCSK9 inhibitors.
How To Lower Cholesterol: Smart Protein
To reduce cholesterol, limit red meat and eat more fish and lean poultry.
How to Prepare Healthy Proteins
- Trim all fat from meats, and remove all skin from poultry before cooking.
- Broil or bake, don’t fry foods.
- Drain fat from any meats before serving.
- Avoid processed meats such as hot dogs or cold cuts, even those labeled “reduced fat,” as many are still high in saturated fats and calories.
- Oily fish such as salmon or trout are high in omega-3 fatty acids, which can reduce triglyceride levels and improve HDL cholesterol levels.
- Soy proteins can also have a beneficial effect and help to reduce LDL cholesterol and triglycerides, while raising HDL cholesterol levels.
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Regulation Of Cholesterol Synthesis
Biosynthesis of cholesterol is directly regulated by the cholesterol levels present, though the homeostatic mechanisms involved are only partly understood. A higher intake from food leads to a net decrease in endogenous production, whereas lower intake from food has the opposite effect. The main regulatory mechanism is the sensing of intracellular cholesterol in the endoplasmic reticulum by the proteinSREBP . In the presence of cholesterol, SREBP is bound to two other proteins: SCAP and INSIG-1. When cholesterol levels fall, INSIG-1 dissociates from the SREBP-SCAP complex, which allows the complex to migrate to the Golgi apparatus. Here SREBP is cleaved by S1P and S2P , two enzymes that are activated by SCAP when cholesterol levels are low.
Cholesterol synthesis can also be turned off when cholesterol levels are high. HMG-CoA reductase contains both a cytosolic domain and a membrane domain. The membrane domain senses signals for its degradation. Increasing concentrations of cholesterol cause a change in this domain’s oligomerization state, which makes it more susceptible to destruction by the proteasome. This enzyme’s activity can also be reduced by phosphorylation by an AMP-activated protein kinase. Because this kinase is activated by AMP, which is produced when ATP is hydrolyzed, it follows that cholesterol synthesis is halted when ATP levels are low.
Cardiovascular And Circulatory Systems
When you have too much LDL cholesterol in your body it can build up in your arteries, clogging them and making them less flexible. Hardening of the arteries is called atherosclerosis. Blood doesnt flow as well through stiff arteries, so your heart has to work harder to push blood through them. Over time, as plaque builds up in your arteries, you can develop heart disease.
Plaque buildup in coronary arteries can disrupt the flow of oxygen-rich blood to your heart muscle. This may cause chest pain called angina. Angina isnt a heart attack, but it is a temporary disruption of blood flow. Its a warning that youre at risk for a heart attack. A piece of plaque can eventually break off and form a clot or the artery may continue to become narrowed which can fully block blood flow to your heart, leading to a heart attack. If this process occurs in the arteries going to the brain or within the brain it can lead to a stroke.
Plaque can also block the flow of blood to arteries that supply blood to your intestinal tract, legs, and feet. This is called peripheral arterial disease .
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Cholesterol Comes In Two Types
High-Density Lipoprotein is sometimes referred to as good cholesterol. HDL removes cholesterol from the artery walls and transports it to the liver where it is removed from the body.
Foods containing HDL are nuts, soy, and fish.
Low-Density Lipoprotein is often referred to as bad cholesterol. LDL deposits cholesterol in the artery walls, which can cause buildup that can narrow or block blood vessels and increase the risk of heart and vascular disease.
Myth: I Cant Do Anything To Change My Cholesterol Levels
Fact: You can do many things to improve your cholesterol levels and keep them in a healthy range!
- Get tested at least every 5 years .1,2 Learn more about cholesterol screenings.
- Make healthy food choices. Limit foods high in saturated fats. Choose foods naturally high in fiber and unsaturated fats. Learn more about healthy diets and nutrition at CDCs nutrition, physical activity, and obesity website.
- Be active every day. The Physical Activity Guidelines for Americans recommends that adults get 150 to 300 minutes of moderate physical activity each week. Learn more about physical activity basics and tips.
- Dont smoke or use tobacco products. Smoking damages your blood vessels, speeds up the hardening of the arteries, and greatly increases your risk for heart disease. If you dont smoke, dont start. If you do smoke, quitting will lower your risk for heart disease. Learn more about tobacco use and ways to quit at CDCs smoking and tobacco use website.
- Talk with your health care provider about ways to manage your cholesterol if any medicines are given to you to manage your cholesterol, take them as they are prescribed. Learn more about medicines to lower cholesterol.
- Know your family history. If your parents or other immediate family members have high cholesterol, you probably should be tested more often. You could have a condition called familial hypercholesterolemia .
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Monitoring Intake Of Fat And Cholesterol
Dietary fat and cholesterol are necessary components for a healthy diet. Though, when consumed in excess, they may be harmful to the body and increase ones risk for obesity, atherosclerosis, and heart disease. Keep in mind, however, that dietary cholesterol does not have as much of an effect on blood cholesterol as saturated fat. It is important to regulate ones intake of dietary fat in order to regulate blood LDL, HDL, and triglyceride levels.
Why You Should Avoid Cholesterol
Cholesterol circulates throughout the bloodstream, and too much of it can have negative effects on your body, especially your heart. High levels of “bad” cholesterol can raise your risk of heart disease or stroke.
When you have too much LDL cholesterol in your system, it can form plaque, which is a buildup on the walls of the blood vessels. This buildup narrows the blood vessels, which blocks the healthy flow of blood in the body and can potentially cause a heart attack or other problems. For this reason, experts recommend consuming less than 300 milligrams of dietary cholesterol per day.
Cholesterol also travels within the central nervous system and is important for normal brain functioning. Too much of it, however, may have negative consequences for learning and memory. Reducing cholesterol through the use of drugs called statins may improve memory, but more research is needed in this regard.
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What Is The Difference Between Good Cholesterol And Bad Cholesterol
Good cholesterol is known as high-density lipoprotein . It removes cholesterol from the bloodstream. Low-density lipoprotein is the bad cholesterol.
If your total cholesterol level is high because of a high LDL level, you may be at higher risk of heart disease or stroke. But, if your total cholesterol level is high only because of a high HDL level, youre probably not at higher risk.
Triglycerides are another type of fat in your blood. When you eat more calories than your body can use, it turns the extra calories into triglycerides.
Changing your lifestyle can improve your cholesterol levels, lower LDL and triglycerides, and raise HDL.
Your ideal cholesterol level will depend on your risk for heart disease.
- Total cholesterol level less than 200 is best, but it depends on your HDL and LDL levels.
- LDL cholesterol levels less than 130 is best, but this depends on your risk for heart disease.
- HDL cholesterol levels 60 or higher reduces your risk for heart disease.
- Triglycerides less than 150 milligrams per deciliter is best.
Putting Together A Low Cholesterol Diet
When it comes to investing money, experts recommend creating a portfolio of diverse investments instead of putting all your eggs in one basket. The same holds true for eating your way to lower cholesterol. Adding several foods to lower cholesterol in different ways should work better than focusing on one or two.
A largely vegetarian “dietary portfolio of cholesterol-lowering foods” substantially lowers LDL, triglycerides, and blood pressure. The key dietary components are plenty of fruits and vegetables, whole grains instead of highly refined ones, and protein mostly from plants. Add margarine enriched with plant sterols oats, barley, psyllium, okra, and eggplant, all rich in soluble fiber soy protein and whole almonds.
Of course, shifting to a cholesterol-lowering diet takes more attention than popping a daily statin. It means expanding the variety of foods you usually put in your shopping cart and getting used to new textures and flavors. But it’s a “natural” way to lower cholesterol, and it avoids the risk of muscle problems and other side effects that plague some people who take statins.
Just as important, a diet that is heavy on fruits, vegetables, beans, and nuts is good for the body in ways beyond lowering cholesterol. It keeps blood pressure in check. It helps arteries stay flexible and responsive. It’s good for bones and digestive health, for vision and mental health.
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Understanding The Highs And Lows Of Cholesterol
You know that too much is dangerous. But what is cholesterol, anyway? Where does it come from? And is it all bad?
Cholesterol is a waxy substance that is found in every cell in the body. Its either made by the body or absorbed from food. Your body needs cholesterol to make important steroid hormones such as estrogen, progesterone and vitamin D. Its also used to make bile acids in the liver these absorb fat during digestion.
So some cholesterol is necessary but bad cholesterol is something you can do without. Excess bad cholesterol in the bloodstream can deposit into the bodys arteries. These deposits are called plaques and result in atherosclerosis, or hardening of the arteries. This is the major cause of heart attacks, strokes and other vascular problems.
Your total cholesterol level is a measure of the total amount of cholesterol circulating in your bloodstream, which includes several components:
- LDL cholesterol: LDL stands for low-density lipoprotein. This is known as the bad cholesterol, which directly contributes to plaque buildup in the arteries. Very low density lipoprotein, or VLDL cholesterol, is another type, which is a precursor to LDL.
- Total cholesterol is VLDL cholesterol plus LDL cholesterol plus HDL cholesterol.
- HDL cholesterol: HDL stands for high-density lipoprotein. Experts think at optimal levels it might help the body get rid of LDL cholesterol.
And guess what? This buildup can start as early as your 20s.
Why Cholesterol Matters For Women
Reviewed By:
Erin Donnelly Michos, M.D., M.H.S.
Ah, cholesterol and triglycerides. We hear about them all the time. Even foods that might seem good for you on the surface, like fruit-filled yogurt or bran muffins, can contribute to abnormal levels if they contain too much saturated fat or refined sugar, says Erin Michos, M.D., associate director of preventive cardiology at the Ciccarone Center for the Prevention of Heart Disease.
Whats more, many women are at risk for high cholesterol and dont realize it. Approximately 45 percent of women over the age of 20 have a total cholesterol of 200 mg/dl and above, which is considered elevated but a survey by the American Heart Association found that 76 percent of women say they dont even know what their cholesterol values are, Michos says.
Scarier still: Triglycerides, a type of blood fat typically measured alongside cholesterol, are even more risky in women compared with men. This is a problem because womens cholesterol levels can fluctuate quite a bit after menopause and tend to increase with age, putting us at greater risk of heart disease and stroke. Knowing your cholesterol numbers and how to control them is a big step toward staying healthy.
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Diagnosing And Treating Hypocholesterolemia
Blood tests are the standard way to diagnose cholesterol levels. Most doctors will consider an LDL cholesterol level less than 50 milligrams per deciliter or a total cholesterol level less than 120 mg/dL as low cholesterol. Total cholesterol is LDL and HDL added together and 20 percent of a persons triglycerides, which are another type of fat found in the bloodstream. You might be interested in knowing that an ideal LDL level is between 70 and 100 mg/dL.
If you havent had your cholesterol checked within the last two years, you should do so.
Lets say that you are diagnosed with low cholesterol what do you do? Low cholesterol treatment is only prescribed after a doctor has taken a close look at your diet, lifestyle, other potential health conditions, as well as yourmental health.
Often times, low cholesterol is caused by something in the diet or a physical condition, so hypocholesterolemia treatment will focus on either foods or the physical ailment. In many cases, just eating cholesterol-rich foods wont solve the problem. Adjustments to diet often need to be coupled with other treatments. When cholesterol level is having an impact on a persons mental health or vice versa, an antidepressant may be prescribed.
During an evaluation, the doctor will also go over any medications that you might be taking. Some statin medications can cause cholesterol levels to decrease. In these situations, it is usually a matter of changing the dose or the medication.