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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Hypertension - high blood pressure - Better Health Channel.
High blood pressure (hypertension) means that your blood is pumping at a For example, a low fat diet and giving up cigarette smoking will reduce the

High & Low Blood PressureMessage Board - Archived 8/30/98-12/21/00
Foods that cause high blood pressure - Jim Abney 10:24:02 10/16/00 (4) .. Question about low blood pressure and Verelan PM - chloe 19:41:45 6/14/00 (0)

Ask the Dietitian - by Joanne Larsen MS RD LD - Salt & Sodium
Pasta would not cause your blood pressure to rise and new research suggests it may not be . My husband is on a low salt diet for high blood pressure.

Using EFT for High (or low) Blood Pressure
This is true for both high blood pressure and low blood pressure. Sometimes the principle cause of the blood pressure problems is one or more unresolved

Low blood pressure
However, there is no evidence that low blood pressure causes either of these . but you still need to continue with the tablets for high blood pressure,

Blood Pressure Guide
To know what is the cause of high blood pressure, it is important to assay the When BP is low, there is not sufficient flow of blood to deliver enough

What is 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.

Low blood pressure - WebMD
Sudden drops in blood pressure can be life-threatening. Causes of this type of hypotension include:. Loss of blood from bleeding; Low body temperature; High

Introduction: Low Blood Pressure: Merck Manual Home Edition
Low blood pressure (hypotension) is blood pressure low enough to cause symptoms If blood pressure is too high, it can damage a blood vessel and even

Natural Remedies for High Blood Pressure
High blood pressure usually doesn't cause any symptoms in the early stages. Low potassium can result in elevated sodium in cells, because the two

Blood Pressure Chart - Normal Blood Pressure Range
I can produce a very high, or very low blood pressure AT WILL, This Vaughns Low-High Normal Blood Pressure Chart webpage was updated on 2007-09-26.

Your Guide to Lowering High Blood Pressure, NHLBI
Prevention - What can I do to prevent high blood pressure? Issues for Women - Learn about conditions that can cause high blood pressure in women

Heartpoint: High Blood Pressure Information
A number of kidney diseases cause high blood pressure. is usually successful at providing enough blood around the obstruction, but the pressure is low,

What Is High Blood Pressure?
High blood pressure is a blood pressure reading of 140/90 mmHg or higher. However, very low blood pressure can sometimes be a cause for concern and

High Blood Pressure: Things You Can Do to Help Lower Yours
What problems does high blood pressure cause? Does it have any symptoms? a healthy diet that includes lots of fruits and vegetables and is low in fat.

Your High Blood Pressure Questions Answered â” Low Blood Pressure
Other prescription and over-the-counter medications may cause low blood pressure when taken in combination with high blood pressure drugs. Heart problems.

Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and
There are many causes of low blood pressure, and treatment is dependant upon the Unlike high blood pressure, low blood pressure is defined primarily by

High blood pressure (hypertension) - causes, treatments and
Isolated systolic high blood pressure; White coat high blood pressure; Borderline high blood pressure. What causes high blood pressure?

What Causes High Blood Pressure?
In 90 to 95 percent of high blood pressure cases, the cause is unknown. In most people, blood pressure isn't too low until it produces symptoms,


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