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: Drugs to Avoid When You Have Hypertension
SOURCES: American Academy of Family Physicians: Blood Pressure Medicines. American Heart Association: Cold and Flu Medication for People with High Blood

Medications and supplements that can raise your blood pressure
If you have high blood pressure, it's best to avoid decongestants. Ask your doctor or pharmacist about over-the-counter cold products specially formulated

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Hypertension (High Blood Pressure) and Stroke Blood Pressure Medication Side Effects. From constipation to headaches to increased sensitivity to cold,

Choosing the Right Cold or Flu Medication for Those with High
"Choosing the Right Cold or Flu Medication for Those with High Blood Pressure." EzineArticles 21 December 2006. 02 January 2008 <http://ezinearticles.com/?

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Cold and Flu Medication for People with High Blood Pressure American Heart Association Lists cold and flu medicines that may be safer for those who suffer

Are Cold Remedies Enough to Raise Blood Pressure?
And for anyone with high blood pressure, the seemingly innocuous cold remedy high blood pressure, those who are not taking blood pressure medication or

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(National Heart, Lung, and Blood Institute). Return to top; Related Issues. Cold and Flu Medication for People with High Blood Pressure(American Heart

Decongestants Pose Potential Risk to High Blood Pressure Sufferers
Coricidin HBP(R), the only line of cold and flu medications formulated to be decongestant free for high blood pressure sufferers, is a safe and effective

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I took my high blood pressure medication for a while, but Iâ™m feeling much better People with high blood pressure should know that taking certain cold,

Cold and Flu Medication for People With High Blood Pressure
About 72 million US adults have high blood pressure. If you're one of them, watch your use of over-the-counter cold and flu medications.


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