What is Cholesterol?

Cholesterol is a sterol (a combination steroid and alcohol). Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of all animals. Because cholesterol is synthesized by all eukaryotes, trace amounts of cholesterol are also found in membranes of plants and fungi.The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the compound "cholesterine".[2]Most of the cholesterol is synthesized by the body and some has dietary origin. Cholesterol is more abundant in tissues which either synthesize more or have more abundant densely-packed membranes, for example, the liver, spinal cord and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory system bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver.According to the lipid hypothesis, abnormally high cholesterol levels (hypercholesterolemia) and abnormal proportions of LDL and HDL are associated with cardiovascular disease by promoting atheroma development in arteries (atherosclerosis). This disease process leads to myocardial infarction (heart attack), stroke and peripheral vascular disease. As high LDL contributes to this process, it is termed "bad cholesterol", while high levels of HDL ("good cholesterol") offer a degree of protection. The balance can be redressed with exercise, a healthy diet, and sometimes medication.

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High Blood Pressure (Hypertension) - Patient UK
It is then called 'secondary hypertension'. For example, certain kidney or hormone problems can cause high blood pressure. How common is high blood pressure

High Blood Pressure - hypertension, symptoms, causes, beta
A few patients have high blood pressure with a known cause (secondary hypertension). If necessary, high blood pressure can be treated with a range of

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High Blood Pressure, causes, cures, treatment, and more. . You can cure your high blood pressure naturally. Dr. Cass Ingram shows you how to use dramatic

What Is High Blood Pressure?
When high blood pressure is not found and treated, it can cause:. The heart to get larger, which may lead to heart failure.

What Causes High Blood Pressure?
In many people with high blood pressure, a single specific cause is not known. This is called essential or primary high blood pressure.

Blood pressure and kidney disease
The next most common cause is kidney disease. Diseases within the kidney itself can cause high blood pressure, and so also can disease of the artery that

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Having high blood pressure can cause heart failure. High blood pressure can cause kidney failure and some eye conditions. High blood pressure is a serious

High blood pressure - what is hypertension?
If your blood pressure is high it causes strain on the vessels carrying blood around your body. This strain can cause vessels to become clogged up or to

High blood pressure - hypertension symptoms, cause, treatment and risk
Although the exact cause of high blood pressure isn't fully understood, it's known that some factors to do with your lifestyle can contribute.

Step 3: What causes high blood pressure?
Although the exact cause of high blood pressure is almost always unknown, many different things can influence it. For example, your blood pressure is

High Blood Pressure - Things you can do to help lower yours
High blood pressure that can be linked to a specific cause, such as a disease or drug, is called secondary hypertension. But most often the exact cause

Secondary high blood pressure: When another condition causes
Various conditions can cause secondary high blood pressure. Treating these underlying conditions can control â” or cure â” your high blood pressure.

High blood pressure (hypertension) - causes, treatments and
What are the causes of secondary high blood pressure? For that reason, the diagnosis of high blood pressure is important so efforts can be made to

High blood pressure: Are you at risk? - MayoClinic.com
However, certain medical conditions can cause high blood pressure. This type of high blood pressure is called secondary high blood pressure or secondary

What Causes High Blood Pressure?
In 90 to 95 percent of high blood pressure cases, the cause is unknown.

High Blood Pressure: Things You Can Do to Help Lower Yours
What problems does high blood pressure cause? Does it have any symptoms? . If your blood pressure can only be controlled with medicine, you'll need to

High Blood Pressure Causes
In most cases, scientists don't know what causes high blood pressure, but they've developed ways to treat it effectively and identified factors that tend to

What Causes High Blood Pressure?
is the term used when no cause can be found for the high blood pressure. Most people with high blood pressure have essential hypertension.

High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis
What makes high blood pressure important is that initially it may cause no symptoms but can still cause serious longâ“term complications.


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