November 09, 2020
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What is cholesterol?
Cholesterol is a type of lipid. It’s a waxy, fat-like substance that your liver produces naturally. It’s vital for the formation of cell membranes, certain hormones, and vitamin D.
Cholesterol doesn’t dissolve in water, so it can’t travel through your blood on its own. To help transport cholesterol, your liver produces lipoproteins.
Lipoproteins are particles made from fat and protein. They carry cholesterol and triglycerides (another type of lipid) through your bloodstream. The two major forms of lipoprotein are low-density lipoprotein (LDL) and high-density lipoprotein (HDL).
If your blood contains too much LDL cholesterol (cholesterol carried by low-density lipoprotein), it’s known as high cholesterol. When left untreated, high cholesterol can lead to many health problems, including heart attack or stroke.
High cholesterol typically causes no symptoms. That’s why it’s important to get your cholesterol levels checked on a regular basis
LDL cholesterol, or “bad cholesterol”
Low-density lipoprotein (LDL) is often called “bad cholesterol.” It carries cholesterol to your arteries. If your levels of LDL cholesterol are too high, it can build up on the walls of your arteries.
The buildup is also known as cholesterol plaque. This plaque can narrow your arteries, limit your blood flow, and raise your risk of blood clots. If a blood clot blocks an artery in your heart or brain, it can cause a heart attack or stroke.
According to the Centers for Disease Control and Prevention, over one-third of American adults have elevated levels of LDL cholesterol.
HDL cholesterol, or “good cholesterol”
High-density lipoprotein (HDL) is sometimes called “good cholesterol.” It helps return LDL cholesterol to your liver to be removed from your body. This helps prevent cholesterol plaque from building up in your arteries.
When you have healthy levels of HDL cholesterol, it can help lower your risk of blood clots, heart disease, and stroke.
Triglycerides, a different type of lipid
Triglycerides are another type of lipid. They’re different from cholesterol. While your body uses cholesterol to build cells and certain hormones, it uses triglycerides as a source of energy.
When you eat more calories than your body can use right away, it converts those calories into triglycerides. It stores triglycerides in your fat cells. It also uses lipoproteins to circulate triglycerides through your bloodstream.
If you regularly eat more calories than your body can use, your triglyceride levels can get high. This may raise your risk of several health problems, including heart disease and stroke.
Your doctor can use a simple blood test to measure your triglyceride level, as well as your cholesterol levels.
Getting your cholesterol levels checked
If you’re age 20 years or older, the American Heart Association recommends getting your cholesterol levels checked at least once every four to six years. If you have a history of high cholesterol or other risk factors for cardiovascular disease, your doctor may encourage you get your cholesterol levels tested more often.
Your doctor can use a lipid panel to measure your total cholesterol level, as well your LDL cholesterol, HDL cholesterol, and triglyceride levels. Your total cholesterol level is the overall amount of cholesterol in your blood. It includes LDL and HDL cholesterol.
If your levels of total cholesterol or LDL cholesterol are too high, your doctor will diagnose you with high cholesterol. High cholesterol is especially dangerous when your LDL levels are too high and your HDL levels are too low.
Recent guidelines for normal cholesterol levels
Your body needs some cholesterol to function properly, including some LDL. But if your LDL levels are too high, it can raise your risk of serious health problems.
In 2013, the American College of Cardiologists (ACC) and the American Heart Association (AHA) developed new guidelines for the treatment of high cholesterol.
Before this change, doctors would manage cholesterol based on numbers in a cholesterol levels chart. Your doctor would measure your total cholesterol, HDL cholesterol, and LDL cholesterol levels. They would then decide whether to prescribe a cholesterol-lowering medication based on how your numbers compared to the numbers in the chart.
Under the new guidelines, in addition to your cholesterol levels, treatment recommendations consider other risk factors for heart disease. These risk factors include diabetes and the estimated 10-year risk for a cardiac event such as a heart attack or stroke. So what your “normal” cholesterol levels are depends on whether you have other risk factors for heart disease.
These new guidelines recommend that if you don’t have risk factors for heart disease, your doctor should prescribe treatment if your LDL is greater than 189 mg/dL. To find out what your personal cholesterol recommendations are, talk to your doctor.
Cholesterol levels chart
With the changes mentioned above in the treatment guidelines for high cholesterol, cholesterol charts are no longer considered the best way for doctors to gauge the management of cholesterol levels in adults.
However, for the average child and adolescent, the National Heart, Lung, and Blood Institute classifies cholesterol levels (mg/dL) as follows:
|Total cholesterol||HDL cholesterol||LDL cholesterol|
|Acceptable||lower than 170||higher than 45||lower than 110|
|High||200 or higher||n/a||higher than 130|
|Low||n/a||lower than 40||n/a|
High cholesterol symptoms
In most cases, high cholesterol is a “silent” problem. It typically doesn’t cause any symptoms. Many people don’t even realize they have high cholesterol until they develop serious complications, such as a heart attack or stroke.
That’s why routine cholesterol screening is important. If you’re age 20 years or older, ask your doctor if you should have routine cholesterol screening.
Causes of high cholesterol
Eating too many foods that are high in cholesterol, saturated fats, and trans fats may increase your risk of developing high cholesterol. Other lifestyle factors can also contribute to high cholesterol. These factors include inactivity and smoking.
Your genetics can also affect your chances of developing high cholesterol. Genes are passed down from parents to children. Certain genes instruct your body on how to process cholesterol and fats. If your parents have high cholesterol, you’re at higher risk of having it too.
In rare cases, high cholesterol is caused by familial hypercholesterolemia. This genetic disorder prevents your body from removing LDL. According to the National Human Genome Research Institute, most adults with this condition have total cholesterol levels above 300 mg/dL and LDL levels above 200 mg/dL.
Other health conditions, such as diabetes and hypothyroidism, may also increase your risk of developing high cholesterol and related complications.
Risk factors for high cholesterol
You may be at a higher risk of developing high cholesterol if you:
People of all ages, genders, and ethnicities can have high cholesterol.
Stellapharm is one of leading generics pharmaceutical companies and strong producer of anti-viral drugs in Vietnam. The company established in Vietnam in 2000; and focuses on both prescription drugs and non-prescription especially in cardiovascular diseases, antiviral drugs, anti-diabetics drugs, etc. and our products are now used by millions of patients in more than 50 countries worldwide.
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