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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Erectile Dysfunction (ED) -- familydoctor.org
If you can't keep your blood sugar or your blood pressure under control, because of a bad experience or because of a previous episode of impotence

Are your medicines disrupting your sex life?
Beta blockers (eg atenolol, propranolol and including timolol eye drops), High blood pressure, angina, glaucoma, Impotence

Impotence treatment and high blood pressure
Certain drugs used to treat high blood pressure can cause impotence and as a result many men stop taking their medication. At present people whose impotence

Men with Erectile Dysfunction More Likely to Have High Blood Pressure
Men with erectile dysfunction (ED) are 38 percent more likely to have hypertension, or high blood pressure, than men without ED, according to new research.

Is It Erectile Dysfunction or High Blood Pressure? on MedicineNet.com
Erectile dysfunction (ED or impotence) is often a side effect of medication for high blood pressure. Learn when to seek help.

Erectile Dysfunction
The word "impotence" may also be used to describe other problems that interfere with . For example, drugs for high blood pressure work in different ways.

Erectile Dysfunction or Impotence
Diabetes, being overweight or having high blood pressure or high blood cholesterol levels can make a man impotent. More than 80 percent of impotence is

HIGH BLOOD PRESSURE DRUGS AND IMPOTENCE
Many men won't take medication for their high blood pressure because it makes them impotent. They are more afraid of impotence than they are of dying from a

High Blood Pressure and ED: When Medicine Is a Problem
Impotence and Age, Diabetes & Impotence, High Blood Pressure and Impotence, STDs, Video: When Medicine Sabotages Your Sex Life, Young Men & Impotence

Can blood pressure medicines cause impotence?
answer for 'Can blood pressure medicines cause impotence?' Impotence, or erectile dysfunction (ED), can result from many medical conditions including high

BBC News | Health | Impotence 'not a side effect' of blood
Impotence may not be a side effect of blood pressure drugs, according to People with high blood pressure who blame their medication for impotence may be


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