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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MedlinePlus: High Blood Pressure
Prevent and Control High Blood Pressure: Mission Possible From the National Institutes of Health (National Heart, Lung, and Blood Institute) - Links to PDF

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Discover The Doctor-Approved Formula Guaranteed To Safely Normalize Your Blood Pressure Levels.

American Nursing Association
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eMedicine Health - High Blood Pressure
Consumer health resource center providing an overview of hypertension and its causes, symptoms and treatment.

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healthy food Research has shown that following a healthy eating plan can both reduce the risk of developing high blood pressure and lower an already

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Systolic blood pressure for most healthy adults falls between 90 and 120 millimeters of mercury (mm Hg). Normal diastolic blood pressure falls between 60

What Is High Blood Pressure?
Learn about various levels of blood pressure and how high blood pressure (hypertension) is defined.

Healthy Blood Pressure Chart - Low Carb
Is your blood pressure healthy? Just how does your blood pressure compare to people in your age group? Check these charts and find out!


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